The Devonian of Pennsylvania.
Contributors: Willard, Bradford, b. 1894; Swartz, Frank M. 1899-; Cleaves, Arthur B. 1905-; Pennsylvania. Bureau of Topographic and Geologic Survey.
Series: Pennsylvania Geological Survey. Fourth series -- bulletin G 19; Pennsylvania Geological Survey (Series) -- bulletin G 19
Publisher: Dept. of Internal Affairs, Topographic and Geologic Survey
Published: 1939
Place of publication: Harrisburg, Pa
Language: eng
Number of pages: 481
Subjects: Geology, Stratigraphic -- Devonian.; Geology -- Pennsylvania.; Paleontology -- Devonian.
Notes: Includes bibliographical references (p. 434-445) and index.
Table of contents: value: Middle and Upper Devonian / by Bradford Willard.; value: Keysor limestone and Helderberg Group / by Frank M. Swartz.; value: Oriskany Group / by Arthur B. Cleaves.