The Martinsburg formation (Middle and Upper Ordovician) in the Delaware Valley, Pennsylvania-New Jersey : a clarification of the stratigraphy of clastic rocks of Middle and Late Ordovician age in western New Jersey and eastern Pennsylvania / by Avery Ala Drake, Jr. and Jack B. Epstein ; prepared in cooperation with the Pennsylvania Geological Survey.
- Physical Description: 1 online resource (16 pages) : illustrations.
- Publisher: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1967.
- Distributor: Washington : U.S. Government Printing Office
|General Note:|| Title from title screen (viewed May 6, 2016).
|Bibliography, etc. Note:|| Includes bibliographical references (pages 15-16).
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- Geological Survey bulletin ; 1244-H
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- Geological Survey bulletin ; 1244-H.
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