Columbia subject headings:
Climatic changes--Congresses.
Glacial epoch--Congresses.
Paleoclimatology--Congresses.
Harvard subject headings:
Climatic changes--Congresses
Glacial epoch--Congresses.
Paleoclimatology--Congresses
Princeton subject headings:
Climatic changes--Congresses.
Glacial epoch--Congresses.
Paleoclimatology--Congresses.