Columbia subject headings:
Geological Survey (U.S.)--Appropriations and expenditures.
Geological mapping--Law and legislation--United States.
Harvard subject headings:
Geological Survey (U.S.)--Appropriations and expenditures.
Geological mapping--Law and legislation--United States.
Princeton subject headings:
Geological Survey (U.S.)--Appropriations and expenditures.
Geological mapping--Law and legislation--United States.