Books by Frank Hall Knowlton — EbookNetworking.net

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... the Stratigraphic Relations and Paleontology of the "Hell Creek Beds", "Ceratops Beds" and Equivalents: And Their Reference to the Fortunion Formation
Frank Hall Knowlton
Nabu Press
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The Flora of the Denver and Associated Formations of Colorado, Professional Paper 155
Frank Hall Knowlton
Government Printing Office
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