Columbia subject headings:
Geology, Structural.
Petroleum in submerged lands--Russia.
Petroleum in submerged lands--Soviet Union.
Petroleum--Geology--Russia.
Petroleum--Geology--Soviet Union.
Harvard subject headings:
Geology, Structural
Petroleum in submerged lands--Soviet Union.
Petroleum--Geology--Soviet Union
Princeton subject headings:
Geology, Structural.
Petroleum in submerged lands--Soviet Union.
Petroleum--Geology--Soviet Union.