Cite
MLA (8th Edition)
Map Showing Total Thickness of the "dakota Sandstone," Montana. U.S. Department of the Interior, U.S. Geological Survey, Open-File Services Section, Western Distribution Branch, U.S. Geological Survey, 1982.
APA (7th Edition)
Map showing total thickness of the "Dakota Sandstone," Montana. (1982). U.S. Department of the Interior, U.S. Geological Survey, Open-File Services Section, Western Distribution Branch, U.S. Geological Survey.
Chicago (17th Edition)
“Map Showing Total Thickness of the ‘Dakota Sandstone," Montana.” Helena, Montana: U.S. Department of the Interior, U.S. Geological Survey, Open-File Services Section, Western Distribution Branch, U.S. Geological Survey, 1982.