Ostrom, J. H. (1970). Stratigraphy and paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin area: Wyoming and Montana. Peabody Museum of Natural History, Yale University.
Citace podle Chicago (17th ed.)Ostrom, John H. Stratigraphy and Paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin Area: Wyoming and Montana. New Haven: Peabody Museum of Natural History, Yale University, 1970.
Citace podle MLA (9th ed.)Ostrom, John H. Stratigraphy and Paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin Area: Wyoming and Montana. Peabody Museum of Natural History, Yale University, 1970.
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