Agkistrodon contortrix (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Agkistrodon contortrix" in Simple English language version.

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animaldiversity.org

Hartsuff, Anna. "Agkistrodon contortrix (Southern Copperhead)". Animal Diversity Web. Retrieved 2020-09-16.

Frost DR; Hammerson GA; Santos-Barrera G (2007). "Agkistrodon contortrix". IUCN Red List of Threatened Species. 2007. Retrieved 2017-05-20.old-form url

"Northern copperhead". Smithsonian's National Zoo. 2016-04-25. Retrieved 2020-09-16.

Moriarty, John J. 2017. Scientific and standard English names of amphibians and reptiles of North America north of Mexico with comments regarding confidence in our understanding. 8th ed. Society Study Amphibians and Reptles Herpetological Circular 43: 102 pp.

McDiarmid, Roy W. (1999). Snake species of the world : a taxonomic and geographic reference. Campbell, Jonathan A., Touré, TŚhaka A., Herpetologists' League. Washington, DC: Herpetologists' League. ISBN 1-893777-01-4. OCLC 42256497.
Campbell, Jonathan A. (2004). The venomous reptiles of the Western Hemisphere. Lamar, William W., 1950-. Ithaca: Comstock Pub. Associates. ISBN 0-8014-4141-2. OCLC 52047308.
Smith, C. F.; Schwenk, K.; Earley, R. L.; Schuett, G. W. (2008). "Sexual size dimorphism of the tongue in a North American pitviper". Journal of Zoology. 274 (4): 367–374. doi:10.1111/j.1469-7998.2007.00396.x. ISSN 0952-8369.^{[permanent dead link]}