Limestones of southwestern Pennsylvania
By: by Frederick G. Clapp.
Series: U.S. Geological Survey. Bulletin -- no. 249; Geological Survey bulletin -- 249.
Publisher: Govt. Print. Off.
Published: 1905
Place of publication: Washington
Language: eng
Number of pages: 52
Subjects: Limestone -- Pennsylvania.; Geology -- Pennsylvania.
Notes: Subject series: A, Economic geology, 42; B, Descriptive geology, 53.

Issued also as House doc. no. 390, 58th Cong., 3d sess.

Includes index.

Bibliography: p. 48.