Brock, J. C. (2021). Renewing the National Cooperative Geologic Mapping Program as the nation's authoritative source for modern geologic knowledge: 2020-2030 Strategy for the National Cooperative Geologic Mapping Program. U.S. Department of the Interior, U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Brock, John C. Renewing the National Cooperative Geologic Mapping Program as the Nation's Authoritative Source for Modern Geologic Knowledge: 2020-2030 Strategy for the National Cooperative Geologic Mapping Program. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2021.
MLA-Zitierstil (9. Ausg.)Brock, John C. Renewing the National Cooperative Geologic Mapping Program as the Nation's Authoritative Source for Modern Geologic Knowledge: 2020-2030 Strategy for the National Cooperative Geologic Mapping Program. U.S. Department of the Interior, U.S. Geological Survey, 2021.