Columbia subject headings:
Geology--Data processing--Congresses.
Geology--Documentation--Congresses.
Geology--Information services--Congresses.
Harvard subject headings:
Earth sciences--Data processing--Congresses.
Earth sciences--Documentation--Congresses.
Earth sciences--Information services--Congresses.
Geology--Data processing--Congresses.
Geology--Documentation--Congresses.
Geology--Information services--Congresses.
Princeton subject headings:
Geology--Data processing--Congresses.
Geology--Documentation--Congresses.
Geology--Information services--Congresses.