Columbia subject headings:
Harvard subject headings:
Geology--Abstracting and indexing.
Hydrology--Abstracting and indexing.
Mines and mineral resources--Abstracting and indexing.
Subject headings--Geology
Subject headings--Hydrology
Subject headings--Mines and mineral resources
Princeton subject headings:
Geology--Abstracting and indexing.
Hydrology--Abstracting and indexing.
Mines and mineral resources--Abstracting and indexing.
Subject headings--Geology.
Subject headings--Hydrology.
Subject headings--Mines and mineral resources.