Columbia subject headings:
Geology, Stratigraphic--Paleozoic--Congresses.
Paleomagnetism--Congresses.
Plate tectonics--Congresses.
Harvard subject headings:
Geology, Stratigraphic--Paleozoic--Congresses
Paleomagnetism--Congresses.
Paleomagnetism--Paleozoic--Congresses.
Plate tectonics--Congresses
Princeton subject headings:
Geology, Stratigraphic--Paleozoic--Congresses.
Paleomagnetism--Congresses.
Plate tectonics--Congresses.