Hell Creek Formation (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hell Creek Formation" in Simple English language version.

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archive.org (Global: 6^th place; Simple English: 4^th place)

Kielan-Jaworowska, Zofia; Cifelli, Richard L.; Luo, Zhe-Xi (2004). Mammals from the Age of Dinosaurs: origins, evolution, and structure. New York: Columbia University Press. pp. 98–99. ISBN 978-0-231-11918-4.

Wilson, G. P. (2013). "Mammals across the K/Pg boundary in northeastern Montana, U.S.A.: Dental morphology and body-size patterns reveal extinction selectivity and immigrant-fueled ecospace filling". Paleobiology. 39 (3): 429–469. doi:10.1666/12041. S2CID 36025237.
Archibald, J. D.; Zhang, Y.; Harper, T.; Cifelli, R. L. (2011). "Protungulatum: confirmed Cretaceous occurrence of an otherwise Paleocene Eutherian (Placental?) mammal". Journal of Mammalian Evolution. 18 (3): 153–161. doi:10.1007/s10914-011-9162-1. S2CID 16724836.

Wilson, G. P. (2013). "Mammals across the K/Pg boundary in northeastern Montana, U.S.A.: Dental morphology and body-size patterns reveal extinction selectivity and immigrant-fueled ecospace filling". Paleobiology. 39 (3): 429–469. doi:10.1666/12041. S2CID 36025237.
Archibald, J. D.; Zhang, Y.; Harper, T.; Cifelli, R. L. (2011). "Protungulatum: confirmed Cretaceous occurrence of an otherwise Paleocene Eutherian (Placental?) mammal". Journal of Mammalian Evolution. 18 (3): 153–161. doi:10.1007/s10914-011-9162-1. S2CID 16724836.