Columbia subject headings:
Petroleum--Geology--Gulf States.
Petroleum--Geology--Mexico.
Salt domes--Gulf States.
Salt domes--Mexico.
Harvard subject headings:
Petroleum--Geology--Gulf States.
Petroleum--Geology--Mexico.
Salt domes--Gulf States.
Salt domes--Mexico.
Princeton subject headings:
Petroleum--Geology--Gulf States.
Petroleum--Geology--Mexico.
Salt domes--Gulf States.
Salt domes--Mexico.