Schmidt, R. G. (1980). The Marquette Range Supergroup in the Gogebic iron district, Michigan and Wisconsin. Dept. of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationSchmidt, Robert Gordon. The Marquette Range Supergroup in the Gogebic Iron District, Michigan and Wisconsin. [Reston, Va.]: Dept. of the Interior, Geological Survey, 1980.
MLA (9th ed.) CitationSchmidt, Robert Gordon. The Marquette Range Supergroup in the Gogebic Iron District, Michigan and Wisconsin. Dept. of the Interior, Geological Survey, 1980.
Warning: These citations may not always be 100% accurate.