Mammoth Open Pit Iron Mine

Front:
171 MAMMOTH OPEN PIT IRON MINE, NORTHERN MINNESOTA SHOWING BOTH ELECTRIC AND STEAM SHOVELS IN OPERATION

Back:
23160N وی در TOST SHOLM GEDOCH 6- AM 1941 PUB. BY AND TRADING POST, DULUTH, MINN.-MADE IN U.S.A. . ده مز مساعد - D. W. Llach cop Pioneer sole con ohnson a شاهر 2.