Organization, programs, and activities of the Geologic Division, U.S. Geological Survey /
Geological Survey (U.S.).Geologic Division.
Davis, Robert Ellis,1924-
Washington : U.S. G.P.O. ; Denver, CO : Free on application to the Books and Open-File Center,
1990.
"A revised version of Circular 1000 ... updated to reflect changes in programs, budget, and personnel as of fiscal year 1989."
Geological Survey (U.S.). Geologic Division.
Geology