Brock, J. C. (2021). Renewing the National Cooperative Geologic Mapping Program as the nation's authoritative source for modern geologic knowledge. U.S. Department of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationBrock, John C. Renewing the National Cooperative Geologic Mapping Program as the Nation's Authoritative Source for Modern Geologic Knowledge. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2021.
MLA (9th ed.) CitationBrock, John C. Renewing the National Cooperative Geologic Mapping Program as the Nation's Authoritative Source for Modern Geologic Knowledge. U.S. Department of the Interior, U.S. Geological Survey, 2021.
Warning: These citations may not always be 100% accurate.