"The Great Northern Iron trust leased its land on the Mesabi iron formation to various mining companies that shipped 721 million tons of natural iron ore and taconite to the eastern steel mills from 1907-2017 -- nearly 15% of the Mesabi's entire historical output.. ...The distinctive history of Grean Northern Iron is presented for the first time in this book. It is based on the Trust's extensive original archival records and in-depth intervirews with its last trustees, managers, and other participants."-- Inside jacket cover.