Greater Pittsburgh region, thickness of rocks over the Upper Freeport coal /

Bibliographic Details
Main Author:	Craft, Jesse L.
Corporate Authors:	Pennsylvania. Bureau of Topographic and Geologic Survey, Geological Survey (U.S.)
Other Authors:	Heyman, Louis, Piotrowski, Robert G., Balogh, Lajos J.
Format:	Map
Language:	English
Published:	[Harrisburg] : The Bureau, 1976.
Series:	Map (Pennsylvania. Bureau of Topographic and Geologic Survey) ; 49.
Subjects:	Geology > Pennsylvania > Pittsburgh Region > Maps. Geology, Stratigraphic > Maps.

Evans: Maps (2nd floor)