Columbia subject headings:
Geology, Stratigraphic--Devonian.
Geology--New England.
Geology--New York (State)
Geology--Québec (Province)
Paleontology--Devonian.
Harvard subject headings:
Geology, Stratigraphic--Devonian
Geology--New England
Geology--New York (State)
Geology--Québec (Province)
Paleontology--Devonian
Princeton subject headings: