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1by Sellards, E. H (Elias Howard), 1875-1961“...Geological Society of America,...”
Published 1940
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5by Wren, Christopher, 1853-“...[Wyoming Historical and Geological Society],...”
Published 1912
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6by Kulp, Geo. B (George Brubaker), 1839-1915“...Compliments of the Wyoming Historical and Geological Society of Wilkes-Barre, Penn'a,...”
Published 1890
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