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Oil spill sensitivity of the western Indian Ocean islands: coastal data from the Comoros Islands, Madagascar, Mauritius, Reunion and the Seychelles - Green, Edmund P. (Edmund Peter) 1965 - (WCMC, 1998)

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On the reptiles and Batrachians of North America - Garman, Samuel, 1843 -1927 (Major, Johnston & Barrett, Yeoman, 1883)

On the type specimens of two Colombian poison frogs described by A.A. Berthold (1845), and their bearing on the locality "Provinz Popayan" - Berthold, Arnold Adolph, 1803 -1861 (American Museum of Natural History, 1996)

On the uniquely fragmented distribution of a rare Panamanian snake, Dipsas nicholsi (Colubridae, Dipsadinae) - Cadle, John E. (American Museum of Natural History, 2007)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1958)

The osteology of the reptiles - Gregory, William K. (William King), 1876 -1970 (Harvard University Press, 1925)

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An oviraptorid skeleton from the late Cretaceous of Ukhaa Tolgod, Mongolia, preserved in an avianlike brooding position over an oviraptorid nest - Chiappe, Luis M. (American Museum of Natural History, 1999)

Paleontological investigations at Mineral Hill Cave - Broughton, Jack M. (U.S. Department of the Interior, Bureau of Land Management, Elko Field Office, 2004)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1883)

Pamietnik Fizyjograficzny (Druk K. Kowalewskiego, 1918)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1999)

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Pantology; or, A systematic survey of human knowledge; proposing a classification of all its branches, and illustrating their history, relations, uses, and objects; with a synopsis of their leading facts and principles; and a select catalogue of books on all subjects, suitable for a cabinet library ... - Park, Roswell, 1807 -1869 (Hogan & Thompson, 1843)

Papéis avulsos do Departamento de Zoologia - São Paulo Departamento de Zoologia (A Secretaria, 1946)

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Parahelicops, Pararhabdophis, paraphyly : phylogenetic relationships among certain Southeast Asian natricine snakes (Hebius) - Kizirian, David A. (American Museum of Natural History, 2018)

Patterns of geographic variation in Florida snakes - Christman, Steven P. (1975)

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Peru : Maijuna - Alverson, William Surprison (Field Museum, Environment, Culture and Conservation, 2010)

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Perú, Medio Putumayo-Algodón - Stotz, Douglas F. (Douglas Forrester), 1956 - (Field Museum of Natural History, 2016)

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Phytoneuron (Guy L. Nesom, 2013)

The pictorial museum of animated nature ... - Knight, Charles, 1791 -1873 (C. Knight, 1844)

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Pleistocene snakes of the Ozark Plateau - Brown, Barnum, 1873 -1963 (American Museum of Natural History, 1958)

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