Columbia subject headings:
Natural gas--Geology--Russia (Federation)--Russian Far East.
Natural gas--Geology--Russia (Federation)--Siberia.
Petroleum--Geology--Russia (Federation)--Russian Far East.
Petroleum--Geology--Russia (Federation)--Siberia.
Harvard subject headings:
Princeton subject headings:
Natural gas--Geology--Russia (Federation)--Russian Far East.
Natural gas--Geology--Russia (Federation)--Siberia.
Petroleum--Geology--Russia (Federation)--Russian Far East.
Petroleum--Geology--Russia (Federation)--Siberia.