Columbia subject headings:
Harvard subject headings:
Petroleum--Alaska--North Slope--Congresses.
Petroleum--Geology--Alaska--North Slope--Congresses.
Petrology--Alaska--North Slope--Congresses.
Princeton subject headings:
Petroleum--Alaska--North Slope--Congresses.
Petroleum--Geology--Alaska--North Slope--Congresses.
Petrology--Alaska--North Slope--Congresses.