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Classification, Paleoecology, and Biostratigraphy of Crinoids from the Stull Shale, Late Pennsylvanian of Nebraska, Kansas, and Iowa

Roger K. PabianHarrell Leroy Strimple

出版	Board of Regents of the University of Nebraska, 1985
URL	http://books.google.com.hk/books?id=07ysAQAACAAJ&hl=&source=gbs_api