Columbia subject headings:
Geochemical prospecting--Africa--Congresses.
Geochemical prospecting--Asia--Congresses.
Organic geochemistry--Africa--Congresses.
Organic geochemistry--Asia--Congresses.
Petroleum--Geology--Africa.
Petroleum--Geology--Asia.
Harvard subject headings:
Geochemical prospecting--Africa--Congresses.
Geochemical prospecting--Asia--Congresses.
Organic geochemistry--Africa--Congresses.
Organic geochemistry--Asia--Congresses.
Princeton subject headings:
Geochemical prospecting--Africa--Congresses.
Geochemical prospecting--Asia--Congresses.
Organic geochemistry--Africa--Congresses.
Organic geochemistry--Asia--Congresses.
Petroleum--Geology--Africa.
Petroleum--Geology--Asia.