Archived eds. http://purl.access.gpo.gov/GPO/LPS111301
Final ed. http://purl.access.gpo.gov/GPO/LPS2878
Google, 1943 http://books.google.com/books?id=3uwbAAAAIAAJ
Google, 1944-45 http://books.google.com/books?id=Og3WAAAAMAAJ
Google, 1946 http://books.google.com/books?id=5uwbAAAAIAAJ
Google, 1948 http://books.google.com/books?id=oe0bAAAAIAAJ
Google, 1950 http://books.google.com/books?id=pJcYAAAAIAAJ
Google, 1951 http://books.google.com/books?id=jqIYAAAAIAAJ
Google, 1952 http://books.google.com/books?id=9-0bAAAAIAAJ
Google, 1952 http://books.google.com/books?id=vQ3WAAAAMAAJ
Google, 1953 http://books.google.com/books?id=nJkYAAAAIAAJ
Google, 1953 http://books.google.com/books?id=Ng7WAAAAMAAJ
Google, 1954 http://books.google.com/books?id=NJoYAAAAIAAJ
Google, 1954 http://books.google.com/books?id=9Q7WAAAAMAAJ
Google, 1955 http://books.google.com/books?id=N-0bAAAAIAAJ
Google, 1955 http://books.google.com/books?id=h_zVAAAAMAAJ
Google, 1956 http://books.google.com/books?id=CqQYAAAAIAAJ
Google, 1956 http://books.google.com/books?id=Y2lqAAAAMAAJ
Google, 1956 http://books.google.com/books?id=Kf3VAAAAMAAJ
Google, 1957 http://books.google.com/books?id=rf3VAAAAMAAJ
Google, 1957 http://books.google.com/books?id=KqQYAAAAIAAJ
Google, 1958 http://books.google.com/books?id=4OwbAAAAIAAJ
Google, 1958 http://books.google.com/books?id=Pv7VAAAAMAAJ
Google, 1959 http://books.google.com/books?id=v_7VAAAAMAAJ
Google, 1960 http://books.google.com/books?id=SP_VAAAAMAAJ
Google, 1960 http://books.google.com/books?id=ZGlqAAAAMAAJ
Google, 1961 http://books.google.com/books?id=6f_VAAAAMAAJ
Google, 1961 http://books.google.com/books?id=ZWlqAAAAMAAJ
Google, 1962 http://books.google.com/books?id=VgDWAAAAMAAJ
Google, 1962 http://books.google.com/books?id=ZmlqAAAAMAAJ
Google, 1963 http://books.google.com/books?id=Z2lqAAAAMAAJ
Google, 1963 http://books.google.com/books?id=mg7WAAAAMAAJ
Google, 1964 http://books.google.com/books?id=9wDWAAAAMAAJ
Google, 1964 http://books.google.com/books?id=aGlqAAAAMAAJ
Google, 1965 http://books.google.com/books?id=aWlqAAAAMAAJ
Google, 1965 http://books.google.com/books?id=hAHWAAAAMAAJ
Google, 1966 http://books.google.com/books?id=o3ZqAAAAMAAJ
Google, 1966 http://books.google.com/books?id=GgLWAAAAMAAJ
Google, 1967 http://books.google.com/books?id=b2hqAAAAMAAJ
Google, 1967 http://books.google.com/books?id=mQLWAAAAMAAJ
Google, 1968 http://books.google.com/books?id=FAPWAAAAMAAJ
Google, 1968 http://books.google.com/books?id=UG1qAAAAMAAJ
Google, 1969 http://books.google.com/books?id=jQPWAAAAMAAJ
Google, 1969 http://books.google.com/books?id=UW1qAAAAMAAJ
Google, 1970 http://books.google.com/books?id=7gPWAAAAMAAJ
Google, 1970 http://books.google.com/books?id=73NqAAAAMAAJ
Google, 1971 http://books.google.com/books?id=jATWAAAAMAAJ
Google, 1972 http://books.google.com/books?id=8XNqAAAAMAAJ
Google, 1972 http://books.google.com/books?id=RwXWAAAAMAAJ
Google, 1972 http://books.google.com/books?id=8nNqAAAAMAAJ
Google, 1973 http://books.google.com/books?id=M1lqAAAAMAAJ
Google, 1973 http://books.google.com/books?id=7gXWAAAAMAAJ
Google, 1974 http://books.google.com/books?id=qwbWAAAAMAAJ
Google, 1975 http://books.google.com/books?id=zl9qAAAAMAAJ
Google, 1975 http://books.google.com/books?id=bgfWAAAAMAAJ
Google, 1976 http://books.google.com/books?id=RgXWAAAAMAAJ
Google, 1977 http://books.google.com/books?id=4wXWAAAAMAAJ
Google, 1977 http://books.google.com/books?id=z19qAAAAMAAJ
Google, 1978 http://books.google.com/books?id=dwbWAAAAMAAJ
Google, 1978 http://books.google.com/books?id=0F9qAAAAMAAJ
Google, 1979 http://books.google.com/books?id=IwfWAAAAMAAJ
Google, 1979 http://books.google.com/books?id=0V9qAAAAMAAJ
Google, 1980 http://books.google.com/books?id=0l9qAAAAMAAJ
Google, 1980 http://books.google.com/books?id=gzwvbCXp_1cC
Google, 1980 http://books.google.com/books?id=TWZqAAAAMAAJ
Google, 1981 http://books.google.com/books?id=NJnxSwh2o_wC
Google, 1981 http://books.google.com/books?id=T2ZqAAAAMAAJ
Google, 1981 http://books.google.com/books?id=TmZqAAAAMAAJ
Google, 1981 http://books.google.com/books?id=OLs8AAAAYAAJ
Google, 1982 http://books.google.com/books?id=UGZqAAAAMAAJ
Google, 1982-1983 http://books.google.com/books?id=qgX5SvRPCKUC
Google, 1984 http://books.google.com/books?id=tGtqAAAAMAAJ
Google, 1984 http://books.google.com/books?id=DgXZXt2tClMC
Google, 1985 http://books.google.com/books?id=LOYyCV5q18UC
Google, 1986 http://books.google.com/books?id=WtFyHUk0UssC
Google, 1987 http://books.google.com/books?id=X5oYAAAAIAAJ
Google, 1988 http://books.google.com/books?id=U-4bAAAAIAAJ
Google, 1988 http://books.google.com/books?id=jXFqAAAAMAAJ
Google, 1988 http://books.google.com/books?id=xosRGSRvli4C
Google, 1989 http://books.google.com/books?id=qe0bAAAAIAAJ
Google, 1990 http://books.google.com/books?id=re0bAAAAIAAJ
Google, 1991 http://books.google.com/books?id=ypcYAAAAIAAJ
Google, 1992 http://books.google.com/books?id=SIEVAAAAMAAJ
Google, 1993 http://books.google.com/books?id=YKYYAAAAIAAJ
Google, 1995 http://books.google.com/books?id=NlZqAAAAMAAJ
Google, 1996 http://books.google.com/books?id=N1ZqAAAAMAAJ
Google, 1997 http://books.google.com/books?id=PINqAAAAMAAJ
Google, 1998 http://books.google.com/books?id=EZcyAAAAMAAJ
Google, 1999 http://books.google.com/books?id=X0pqAAAAMAAJ
Google, 1999 http://books.google.com/books?id=wpcyAAAAMAAJ
Google, 2000 http://books.google.com/books?id=YEpqAAAAMAAJ
Google, 2001 http://books.google.com/books?id=NLXuAAAAMAAJ
Google, 2002 http://books.google.com/books?id=6qYYAAAAIAAJ
Google, 2003 http://books.google.com/books?id=47JpAAAAMAAJ
Google, 2003 http://books.google.com/books?id=YUpqAAAAMAAJ
Google, 2003 http://books.google.com/books?id=NaoYAAAAIAAJ
Google, 2004/05 http://books.google.com/books?id=jqoYAAAAIAAJ
Google, 2006 http://books.google.com/books?id=VFVqAAAAMAAJ
Google, 2007 http://books.google.com/books?id=B5RqAAAAMAAJ
Google, 1989 http://books.google.com/books?id=hPbkrrtgr10C
Google, 1950 http://books.google.com/books?id=SFI-AQAAMAAJ
Google, 1911 cop.2 http://books.google.com/books?id=UlI-AQAAMAAJ
Google, 2002 http://books.google.com/books?id=fFU-AQAAMAAJ
Google, 1935 http://books.google.com/books?id=LlM-AQAAMAAJ
Google, 1985 cop.2 http://books.google.com/books?id=QFo-AQAAMAAJ
Google, 1940 http://books.google.com/books?id=ZFQ-AQAAMAAJ
Google, 1986 http://books.google.com/books?id=kFU-AQAAMAAJ
Google, 1914 http://books.google.com/books?id=Ak0-AQAAMAAJ
Google, 2002 http://books.google.com/books?id=al0-AQAAMAAJ
Google, 1967 http://books.google.com/books?id=TFM-AQAAMAAJ
Google, 1913 cop.2 http://books.google.com/books?id=8lI-AQAAMAAJ
Google, 1939 http://books.google.com/books?id=mlA-AQAAMAAJ
Google, 1949 http://books.google.com/books?id=2lE-AQAAMAAJ
Google, 1932 http://books.google.com/books?id=U1I-AQAAMAAJ
Google, 1969 http://books.google.com/books?id=I1o-AQAAMAAJ
Google, 1979 http://books.google.com/books?id=41M-AQAAMAAJ
Google, 1891 http://books.google.com/books?id=P00-AQAAMAAJ
Google, 1920 http://books.google.com/books?id=i1E-AQAAMAAJ
Google, 1990 http://books.google.com/books?id=s1Y-AQAAMAAJ
Google, 1952 http://books.google.com/books?id=F1c-AQAAMAAJ
Google, 1895 http://books.google.com/books?id=t00-AQAAMAAJ
Google, 1954 http://books.google.com/books?id=Q1M-AQAAMAAJ
Google, 1987 http://books.google.com/books?id=21s-AQAAMAAJ
Google, 1958 http://books.google.com/books?id=01Q-AQAAMAAJ
Google, 1910 http://books.google.com/books?id=s1E-AQAAMAAJ
Google, 1990 http://books.google.com/books?id=M1k-AQAAMAAJ
Google, 1964 http://books.google.com/books?id=x1E-AQAAMAAJ
Google, 1907 http://books.google.com/books?id=r1A-AQAAMAAJ
Google, 1977 http://books.google.com/books?id=5lE-AQAAMAAJ
Google, 1971 http://books.google.com/books?id=_E8-AQAAMAAJ
Google, 1923 http://books.google.com/books?id=alA-AQAAMAAJ
Google, 1976 http://books.google.com/books?id=zlA-AQAAMAAJ
Google, 1959 http://books.google.com/books?id=GlU-AQAAMAAJ
Google, 1987 http://books.google.com/books?id=wFQ-AQAAMAAJ
Google, 1916 http://books.google.com/books?id=uE0-AQAAMAAJ
Google, 1968 cop.2 http://books.google.com/books?id=elk-AQAAMAAJ
Google, 1940 http://books.google.com/books?id=DFQ-AQAAMAAJ
Google, 1965 http://books.google.com/books?id=9Fc-AQAAMAAJ
Google, 1934 http://books.google.com/books?id=6lI-AQAAMAAJ
Google, 1977 http://books.google.com/books?id=WlE-AQAAMAAJ
Google, 1979 http://books.google.com/books?id=YlM-AQAAMAAJ
Google, 1925 http://books.google.com/books?id=ClE-AQAAMAAJ
Google, 1962 http://books.google.com/books?id=X1c-AQAAMAAJ
Google, 1991 http://books.google.com/books?id=RV0-AQAAMAAJ
Google, 1937 http://books.google.com/books?id=B1A-AQAAMAAJ
Google, 1988 http://books.google.com/books?id=G1U-AQAAMAAJ
Google, 1882-1886 http://books.google.com/books?id=XVQ-AQAAMAAJ
Google, 1981 http://books.google.com/books?id=JVU-AQAAMAAJ
Google, 1966 http://books.google.com/books?id=vVg-AQAAMAAJ
Google, 1947 http://books.google.com/books?id=W1E-AQAAMAAJ
Google, 1912 http://books.google.com/books?id=I1I-AQAAMAAJ
Google, 1903 http://books.google.com/books?id=1U8-AQAAMAAJ
Google, 1905 http://books.google.com/books?id=Q1A-AQAAMAAJ
Google, 1908 http://books.google.com/books?id=C1E-AQAAMAAJ
Google, 1968 http://books.google.com/books?id=VFk-AQAAMAAJ
Google, 1933 http://books.google.com/books?id=ulI-AQAAMAAJ
Google, 1930 http://books.google.com/books?id=xlA-AQAAMAAJ
Google, 1979 http://books.google.com/books?id=KFM-AQAAMAAJ
Google, 1928 http://books.google.com/books?id=_FE-AQAAMAAJ
Google, 1919 http://books.google.com/books?id=gk4-AQAAMAAJ
Google, 1967 http://books.google.com/books?id=GFk-AQAAMAAJ
Google, 1989 http://books.google.com/books?id=TGE-AQAAMAAJ
Google, 1928 cop.2 http://books.google.com/books?id=DlQ-AQAAMAAJ
Google, 1981 http://books.google.com/books?id=1lQ-AQAAMAAJ
Google, 1976 http://books.google.com/books?id=7lA-AQAAMAAJ
Google, 1978 cop.3 http://books.google.com/books?id=6lk-AQAAMAAJ
Google, 1921 cop.2 http://books.google.com/books?id=tFM-AQAAMAAJ
Google, 1893 http://books.google.com/books?id=fk0-AQAAMAAJ
Google, 1964 http://books.google.com/books?id=sFc-AQAAMAAJ
Google, 1975 http://books.google.com/books?id=qFA-AQAAMAAJ
Google, 1941 http://books.google.com/books?id=DFE-AQAAMAAJ
Google, 1917 http://books.google.com/books?id=iE0-AQAAMAAJ
Google, 1926 http://books.google.com/books?id=cFE-AQAAMAAJ
Google, 1982 http://books.google.com/books?id=OFI-AQAAMAAJ
Google, 1986 http://books.google.com/books?id=YlU-AQAAMAAJ
Google, 1963 http://books.google.com/books?id=3lE-AQAAMAAJ
Google, 1978 http://books.google.com/books?id=QlI-AQAAMAAJ
Google, 1905 http://books.google.com/books?id=_08-AQAAMAAJ
Google, 1905 http://books.google.com/books?id=bVA-AQAAMAAJ
Google, 1981 http://books.google.com/books?id=X1Q-AQAAMAAJ
Google, 1986 http://books.google.com/books?id=L1w-AQAAMAAJ
Google, 1893 http://books.google.com/books?id=YU0-AQAAMAAJ
Google, 1912 http://books.google.com/books?id=MVU-AQAAMAAJ
Google, 1926 http://books.google.com/books?id=rVE-AQAAMAAJ
Google, 1950 http://books.google.com/books?id=G1I-AQAAMAAJ
Google, 1923 http://books.google.com/books?id=MVA-AQAAMAAJ
Google, 1990 http://books.google.com/books?id=AVg-AQAAMAAJ
Google, 1924 http://books.google.com/books?id=lVA-AQAAMAAJ
Google, 1980 http://books.google.com/books?id=wVE-AQAAMAAJ
Google, 1969 http://books.google.com/books?id=kVk-AQAAMAAJ
Google, 1965 http://books.google.com/books?id=b1g-AQAAMAAJ
Google, 1887 http://books.google.com/books?id=f00-AQAAMAAJ
Google, 1900 http://books.google.com/books?id=fU8-AQAAMAAJ
Google, 1922 http://books.google.com/books?id=608-AQAAMAAJ
Google, 1931 http://books.google.com/books?id=Q1I-AQAAMAAJ
Google, 1921 http://books.google.com/books?id=RE0-AQAAMAAJ
Google, 1902 http://books.google.com/books?id=pk8-AQAAMAAJ
Google, 1942 http://books.google.com/books?id=ulQ-AQAAMAAJ
Google, 1911 http://books.google.com/books?id=_lE-AQAAMAAJ
Google, 1961 http://books.google.com/books?id=HFc-AQAAMAAJ
Google, 1904 http://books.google.com/books?id=FFA-AQAAMAAJ
Google, 1982 http://books.google.com/books?id=xFQ-AQAAMAAJ
HathiTrust Digital Library, Full view http://catalog.hathitrust.org/api/volumes/oclc/1193890.html
http://www.llmcdigital.org/default.aspx?redir=96022
Archived eds. http://www.census.gov/library/publications/time-series/statistical_abstracts.html
Google http://books.google.com/books?id=-0jhfGqhNXcC
Google http://books.google.com/books?id=2E2or31wHpkC
Google http://books.google.com/books?id=MvpHegfw56AC
Google http://books.google.com/books?id=PRoH-w1jT1UC
Google http://books.google.com/books?id=rr0ExN4hoFsC
Google http://books.google.com/books?id=tHLwewsIaCUC
Google http://books.google.com/books?id=XW5XN5bAxeUC
Google http://books.google.com/books?id=I030jpvfso4C
Google http://books.google.com/books?id=lJQCGY5B8BMC
Google http://books.google.com/books?id=i4EVYYwjIKsC
Google http://books.google.com/books?id=xOgD1-1eaycC
Google http://books.google.com/books?id=fT1JqVEcSrIC
Google http://books.google.com/books?id=FrqSMxjCHhwC
Google http://books.google.com/books?id=xtXpBAaphu0C
Google http://books.google.com/books?id=U061-2UjfvsC
Google http://books.google.com/books?id=DbQ0TmaiTAEC
Google http://books.google.com/books?id=4LI8hMS0J0QC
Google http://books.google.com/books?id=DUVNDxFeOOwC
Google http://books.google.com/books?id=PRe6rdwrtNQC
Google http://books.google.com/books?id=DB494QoXqJoC
Google http://books.google.com/books?id=lw5vzYuh-NMC
Google http://books.google.com/books?id=RCDl5mhhWyoC
Google http://books.google.com/books?id=lz2DB_NIFFsC
Google http://books.google.com/books?id=fHJvnMSKtSwC
Google http://books.google.com/books?id=WZDpTE15aVAC
Google http://books.google.com/books?id=ECtwvGWFaTYC
Google http://books.google.com/books?id=rKvgW250uqsC
Google http://books.google.com/books?id=Xgk07dKoWSoC
Google http://books.google.com/books?id=8xaSejmlNqoC
Google http://books.google.com/books?id=YSyKKb92dFwC
Google http://books.google.com/books?id=h_cK2OI-byoC
Google http://books.google.com/books?id=vub5nZwpwJ0C
Google http://books.google.com/books?id=rz4iiyBg-D4C
Google http://books.google.com/books?id=aU7BhZJSYioC
Google http://books.google.com/books?id=6V6tunSEcPQC
Google http://books.google.com/books?id=S-OHuNEwcN4C
Google http://books.google.com/books?id=dm6xvJe-0j0C
Google http://books.google.com/books?id=GtF6d7HaNO0C
Google http://books.google.com/books?id=qa7sR9Zij4MC
Google http://books.google.com/books?id=08SAM9QvjVQC
Google http://books.google.com/books?id=2RPEbea_AQ0C
Google http://books.google.com/books?id=SsiTWPX5a3gC
Google http://books.google.com/books?id=LTqriqRpGuEC
Google http://books.google.com/books?id=4oZgtJNOEBEC
Google http://books.google.com/books?id=8PFmBoKWMjYC
Google http://books.google.com/books?id=uH7-jUz8QnQC
Google http://books.google.com/books?id=Z49U33pvnjcC
Google http://books.google.com/books?id=-6nQdNo_Z3EC
Google http://books.google.com/books?id=nJGYIQARekkC
Google http://books.google.com/books?id=OHWv_toNGYMC
Google http://books.google.com/books?id=EUxESgGcrTUC
Google http://books.google.com/books?id=E0i5BGIK57IC
Google http://books.google.com/books?id=Fg7TJuRoQXAC
Google http://books.google.com/books?id=1Z6cPdFgMJIC
Google http://books.google.com/books?id=tl5qLUTdgugC
Google http://books.google.com/books?id=8Snx6Uzd0zoC
Google http://books.google.com/books?id=pzmEu_OUn0kC
Google http://books.google.com/books?id=yv4SSZrFla0C
Google http://books.google.com/books?id=tkSzLjXHeqYC
Google http://books.google.com/books?id=M9OIqRrrVqwC
Google http://books.google.com/books?id=B0JyEB3sGPsC
Google http://books.google.com/books?id=RFVA1vqthC4C
Google http://books.google.com/books?id=CsdJM3ltJUYC
Google http://books.google.com/books?id=fYnrQ2G4_YQC
Google http://books.google.com/books?id=psk0f5_dkfoC
Google http://books.google.com/books?id=4lGyZBBjf5gC
Google http://books.google.com/books?id=vCmXqUnAsHkC
Google http://books.google.com/books?id=hxQ0NB9lU_EC
Google http://books.google.com/books?id=zLba2JzaAIcC
Google http://books.google.com/books?id=I9VCAqF5hucC
Google http://books.google.com/books?id=kjEYW7bb2Q0C
Google http://books.google.com/books?id=w8X-MwkccOQC
Google http://books.google.com/books?id=yi44Wwj5L7UC
Google http://books.google.com/books?id=2ie0X2IHi24C
Google http://books.google.com/books?id=TZzTTCa-rGcC
Google http://books.google.com/books?id=rfjy6nHKdqkC
Google http://books.google.com/books?id=rl0EwDFt31sC
Google http://books.google.com/books?id=v557-8PYyU0C
Google http://books.google.com/books?id=vr0ddVAy-MEC
Google http://books.google.com/books?id=9mdoJ5RAJ-oC
Google http://books.google.com/books?id=kpXxbvWBwJYC
Google http://books.google.com/books?id=J7EknDExALQC
Google http://books.google.com/books?id=bZHwLNwoW8QC
Google http://books.google.com/books?id=C-HRFedPgRUC
Google http://books.google.com/books?id=OM5mXzEphy4C
Google, 1943 http://books.google.com/books?id=GVE-AQAAMAAJ
Google http://books.google.com/books?id=iOAS0jmkyRcC
Google http://books.google.com/books?id=reu6OfutdK8C
Google, 1953 http://books.google.com/books?id=bVI-AQAAMAAJ
Google http://books.google.com/books?id=Pmytz__6ov0C
Google, 1989 http://books.google.com/books?id=71w-AQAAMAAJ
Google, 1930 cop.2 http://books.google.com/books?id=4FM-AQAAMAAJ
Google http://books.google.com/books?id=gsqpVckVaXEC
Google, 1980 http://books.google.com/books?id=9lE-AQAAMAAJ
Google, 1962 http://books.google.com/books?id=nFE-AQAAMAAJ
Google http://books.google.com/books?id=RyV7P8az8EQC
Google http://books.google.com/books?id=Op8ka45_A8UC