Clay and shale resources in southwestern Pennsylvania
By: by Henry Leighton ; with Laboratory tests by J.B. Shaw
Contributors: Shaw, J. B. (Joseph Bradfield), 1884-; Pennsylvania. Bureau of Topographic and Geologic Survey
Series: Bulletin M -- 17; Bulletin M -- 17.
Publisher: Dept. of Internal Affairs, Topographic and Geologic Survey
Published: 1932
Place of publication: Harrisburg, Pa
Language: eng
Number of pages: 190
Subjects: Clay; Shale; Mines and mineral resources
Other titles: Pennsylvania Geological Survey,
Notes: One folded map in pocket at end.

Includes bibliographical references and index.