Title: Handbook of mining in the Lake Superior region /
Authors: Winchell, Alexander Newton, 1874-1958.; American Institute of Mining, Metallurgical, and Petroleum Engineers; Engineers' Club of Northern Minnesota.; Duluth Engineers' Club.
Publisher: Press of Byron & Learned company,
Year: 1920
Subjects: Mines and mineral resources Superior, Lake.; Iron mines and mining Superior, Lake.; Copper mines and mining Superior, Lake.