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The dinosaurs of North America . GEOLOGICAL SURVEY SIXTEENTH ANNUAL REPORT PART PL LXXIX PUBES OF PREDENTATE DINOSAURS CAMPTOSAURUS CLAOSAURUS DRYOSAURUS LAOSAURUS STEGOSAURUS AND TRICERATOPS Pl LXXIX Illustration biodiversitylibrary org title Marsh Othniel Charles NameFound Camptosaurus NameConfirmed Camptosaurus EOLID