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Everhart, Michael J.; Ewell, Keith. (2006/04). [27:SDHCVF2.0.CO;2/Shark-bitten-dinosaur-Hadrosauridae-caudal-vertebrae-from-the-Niobrara-Chalk/10.1660/0022-8443(2006)109[27:SDHCVF]2.0.CO;2.full «Shark-bitten dinosaur (Hadrosauridae) caudal vertebrae from the Niobrara Chalk (Upper Coniacian) of western Kansas»] Transactions of the Kansas Academy of Science 109 (1): 27–35. doi:10.1660/0022-8443(2006)109[27:SDHCVF]2.0.CO;2. ISSN0022-8443. (Noiz kontsultatua: 2021-01-12).
Everhart, Michael J.; Ewell, Keith. (2006/04). [27:SDHCVF2.0.CO;2/Shark-bitten-dinosaur-Hadrosauridae-caudal-vertebrae-from-the-Niobrara-Chalk/10.1660/0022-8443(2006)109[27:SDHCVF]2.0.CO;2.full «Shark-bitten dinosaur (Hadrosauridae) caudal vertebrae from the Niobrara Chalk (Upper Coniacian) of western Kansas»] Transactions of the Kansas Academy of Science 109 (1): 27–35. doi:10.1660/0022-8443(2006)109[27:SDHCVF]2.0.CO;2. ISSN0022-8443. (Noiz kontsultatua: 2021-01-12).