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Download or read book On the Fossil Foot marks in the Red Sandstone of Pottsville Pennsylvania written by Isaac Lea and published by . This book was released on 1852 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book On a Fossil Saurian of the New Red Sandstone Formation of Pennsylvania with Some Account of that Formation written by Isaac Lea and published by . This book was released on 1852 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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