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A century of research at Petrified Forest National Park : geology and paleontology / edited by William G. Parker, Sidney R. Ash, and Randall B. Irmis

Forward [sic] / William G. Parker, David D. Gillette, and Randall B. Irmis -- Dedication to Sidney R. Ash, Ph.D. / David D. Gillette and William G. Parker -- On the shoulders of giants : influential ...