Columbia subject headings:
Geology, Stratigraphic--Devonian--Congresses.
Geology--Congresses.
Paleontology, Stratigraphic--Congresses.
Paleontology--Devonian--Congresses.
Harvard subject headings:
Conference papers and proceedings.
Geology, Stratigraphic--Devonian--Congresses.
Geology--Congresses
Paleontology, Stratigraphic--Congresses.
Paleontology--Devonian--Congresses.
Sedimentation and deposition--Congresses.
Princeton subject headings:
Geology, Stratigraphic--Devonian--Congresses.