Columbia subject headings:
Geodynamics--Congresses.
Natural gas--Geology--Congresses.
Petroleum--Geology--Congresses.
Sedimentary basins--Congresses.
Harvard subject headings:
Geodynamics--Congresses
Natural gas--Geology--Congresses
Petroleum--Geology--Congresses
Sedimentary basins--Congresses.
Princeton subject headings:
Geodynamics--Congresses.
Natural gas--Geology--Congresses.
Petroleum--Geology--Congresses.
Sedimentary basins--Congresses.