Columbia subject headings:
Harvard subject headings:
Geological Survey (U.S.)--Bibliography--Periodicals.
Geology--United States--Maps--Bibliography--Periodicals.
Hydrology--United States--Maps--Bibliography--Periodicals.
Mines and mineral resources--United States--Maps--Bibliography--Periodicals.
Princeton subject headings:
Geological Survey (U.S.)--Bibliography--Periodicals.
Geology--United States--Maps--Bibliography--Periodicals.
Hydrology--United States--Maps--Bibliography--Periodicals.
Maps.
Periodicals.