Columbia subject headings:
Chemistry--Congresses.
Chemistry--Periodicals.
Geology--Congresses.
Geology--Periodicals.
Paleontology--Congresses.
Paleontology--Periodicals.
Physics--Congresses.
Physics--Periodicals.
Science--Congresses.
Science--Periodicals.
Harvard subject headings:
Earth sciences--Congresses
Physical sciences--Congresses.
Physical sciences--Periodicals
Princeton subject headings:
Chemistry--Periodicals.
Geology--Periodicals.
Paleontology--Periodicals.
Periodicals.
Physics--Periodicals.