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Upper Ordovician and Silurian Stratigraphy in Sequatchie Valley and Parts of the Adjacent Valley and Ridge, Tennessee
Robert C. MiliciHelmuth Wedow
出版U.S. Government Printing Office, 1976
URLhttp://books.google.com.hk/books?id=SQkit3aqv2gC&hl=&source=gbs_api
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