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On the Fossil Faunas of the Upper Devonian, Along the Meridian of 76 ̊30ʹ, from Tompkins County, N.Y., to Bradford County, Pa
Henry Shaler Williams
出版U.S. Government Printing Office, 1884
URLhttp://books.google.com.hk/books?id=RnXKVCrold4C&hl=&source=gbs_api
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