Geological Survey (U.S.) & Schultz, L. G. (1980). Composition and properties of the Pierre Shale and equivalent rocks, northern Great Plains region. Dept. of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and Leonard Gene Schultz. Composition and Properties of the Pierre Shale and Equivalent Rocks, Northern Great Plains Region. [Reston, Va.]: Dept. of the Interior, Geological Survey, 1980.
MLA (9th ed.) CitationGeological Survey (U.S.) and Leonard Gene Schultz. Composition and Properties of the Pierre Shale and Equivalent Rocks, Northern Great Plains Region. Dept. of the Interior, Geological Survey, 1980.
Warning: These citations may not always be 100% accurate.