Columbia subject headings:
Geology--Research--Periodicals.
Geology--Texas--Periodicals.
Hydrology--Research--Texas--Periodicals.
Mines and mineral resources--Texas--Periodicals.
Harvard subject headings:
Geology--Research--Periodicals.
Geology--Texas--Periodicals.
Hydrology--Research--Texas--Periodicals.
Mines and mineral resources--Texas--Periodicals.
Princeton subject headings:
Geology--Research--Periodicals.
Geology--Texas--Periodicals.
Mines and mineral resources--Texas--Periodicals.
Periodicals.
University of Texas at Austin. Bureau of Economic Geology--Periodicals.