Columbia subject headings:
Harvard subject headings:
Biology--Congresses
Geology, Stratigraphic--Congresses
Ostracoda, Fossil--Congresses.
Paleontology--Congresses
Princeton subject headings:
Biology--Congresses.
Geology, Stratigraphic--Congresses.
Ostracoda, Fossil--Congresses.
Paleontology--Congresses.