Columbia subject headings:
Mollusks, Fossil--Congresses.
Paleontology--Europe--Congresses.
Paleontology--Germany (West)--Congresses.
Sedimentary rocks--Europe--Congresses.
Sedimentary rocks--Germany (West)--Congresses.
Sedimentation and deposition--Congresses.
Harvard subject headings:
Mollusks, Fossil--Congresses.
Paleontology--Europe--Congresses.
Paleontology--Germany (West)--Congresses.
Paleontology--Germany--Congresses.
Sedimentary rocks--Europe--Congresses.
Sedimentary rocks--Germany (West)--Congresses.
Sedimentary rocks--Germany--Congresses.
Sedimentation and deposition--Congresses.
Princeton subject headings:
Geology--Periodicity--Congresses.
Paleoecology--Congresses.
Sea level--Congresses.
Sedimentation and deposition--Congresses.