Schultz, L. G. (1980). Composition and properties of the Pierre Shale and equivalent rocks, northern Great Plains region. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationSchultz, Leonard Gene. Composition and Properties of the Pierre Shale and Equivalent Rocks, Northern Great Plains Region. Washington: United States Department of the Interior, Geological Survey, 1980.
MLA (9th ed.) CitationSchultz, Leonard Gene. Composition and Properties of the Pierre Shale and Equivalent Rocks, Northern Great Plains Region. United States Department of the Interior, Geological Survey, 1980.
Warning: These citations may not always be 100% accurate.