Niger Delta red colobus (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Niger Delta red colobus" in English language version.

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anu.edu.au

Ikemeh, R.; Oates, J.F.; Inaoyom, I. (2019). "Piliocolobus epieni". IUCN Red List of Threatened Species. 2019: e.T41024A92656391. doi:10.2305/IUCN.UK.2019-3.RLTS.T41024A92656391.en. Retrieved 19 November 2021.
Williamson, Kay (November 2002). "Charles Bruce Powell 1943-1998". Crustaceana. 75 (10): 1275–1278. doi:10.1163/156854002321518207. JSTOR 20105513. Retrieved 29 April 2023.

Ikemeh, R.; Oates, J.F.; Inaoyom, I. (2019). "Piliocolobus epieni". IUCN Red List of Threatened Species. 2019: e.T41024A92656391. doi:10.2305/IUCN.UK.2019-3.RLTS.T41024A92656391.en. Retrieved 19 November 2021.

Williamson, Kay (November 2002). "Charles Bruce Powell 1943-1998". Crustaceana. 75 (10): 1275–1278. doi:10.1163/156854002321518207. JSTOR 20105513. Retrieved 29 April 2023.

Mittermeier, R.A.; Wallis, J.; Rylands, A.B.; Ganzhorn, J.U.; Oates, J.F.; Williamson, E.A.; Palacios, E.; Heymann, E.W.; Kierulff, M.C.M.; Long Yongcheng; Supriatna, J.; Roos, C.; Walker, S.; Cortés-Ortiz, L.; Schwitzer, C., eds. (2009). Primates in Peril: The World's 25 Most Endangered Primates 2008–2010 (PDF). Illustrated by S.D. Nash. Arlington, VA.: IUCN/SSC Primate Specialist Group (PSG), International Primatological Society (IPS), and Conservation International (CI). pp. 1–92. ISBN 978-1-934151-34-1. Archived from the original (PDF) on 2 August 2012. Retrieved 7 August 2010.

"NIGERIA BIODIVERSITY AND TROPICAL FORESTRY ASSESSMENT" (PDF). USAID. June 2008. p. 76. Retrieved 18 September 2010.

Mittermeier, R.A.; Wallis, J.; Rylands, A.B.; Ganzhorn, J.U.; Oates, J.F.; Williamson, E.A.; Palacios, E.; Heymann, E.W.; Kierulff, M.C.M.; Long Yongcheng; Supriatna, J.; Roos, C.; Walker, S.; Cortés-Ortiz, L.; Schwitzer, C., eds. (2009). Primates in Peril: The World's 25 Most Endangered Primates 2008–2010 (PDF). Illustrated by S.D. Nash. Arlington, VA.: IUCN/SSC Primate Specialist Group (PSG), International Primatological Society (IPS), and Conservation International (CI). pp. 1–92. ISBN 978-1-934151-34-1. Archived from the original (PDF) on 2 August 2012. Retrieved 7 August 2010.
Groves, C. (2007). "The taxonomic diversity of the Colobinae of Africa" (PDF). Journal of Anthropological Sciences. 85: 7–34. Archived from the original (PDF) on 14 May 2013.