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Trace Fossils from the Rock Bluff Limestone (Pennsylvanian, Kansas)

Richard H. Maerz (Jr.)Roger L. KaeslerWilliam G. Hakes

出版	University of Kansas Paleontological Institute, 1976
URL	http://books.google.com.hk/books?id=1yiXGQAACAAJ&hl=&source=gbs_api