Upper Devonian marine-nonmarine transition, southern Pennsylvania /

Bibliographic Details
Main Author:	Walker, Roger G.
Format:	Book
Language:	English
Published:	Harrisburg : [Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey], 1972.
Series:	Bulletin (Pennsylvania. Bureau of Topographic and Geologic Survey) ; G62.
Subjects:	Geology, Stratigraphic > Devonian. Geology > Pennsylvania.

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