found: Charland, M.B. Status of the northern Pacific rattlesnake in British Columbia, 1993:abstr. (Crotalus viridis oreganus)
found: Frank, N. A complete guide to sci. and common names of reptiles and amphibians of the world, c1995:p. 259 (Crotalus viridis oreganus, Northern Pacific rattlesnake)
found: Behler, J.L. Natl. Audubon Soc. field guide to No. Am. reptiles and amphibians, 1979:p. 694 (Western rattlesnake (Crotalus viridis). Subspecies: Prairie, Grand Canyon, Arizona Black, Midget Faded, Southern Pacific, Great Basin, Hopi, Northern Pacific) p. 695 (Northern Pacific (C. v. oreganus))
found: Collins, J.T. Standard common and current sci. names for No. Am. amphibians and reptiles, 1990:p. 28 (Crotalus viridis oreganus, Northern Pacific Rattlesnake)
found: Collins, J.T. Standard common and current scientific names for North American amphibians, turtles, reptiles & crocodilians, 2002, via WWW, Oct. 1, 2007(Crotalus oreganus oreganus - Northern Pacific Rattlesnake; subspecies of Crotalus oreganus - Western Rattlesnake)
found: ITIS, Oct. 1, 2007(Crotalus oreganus oreganus Holbrook, 1840 -- Northern Pacific Rattlesnake)
found: NatureServe explorer, via WWW, Oct. 1, 2007(Crotalus oreganus oreganus, Northern Pacific Rattlesnake)
notfound: Web. 3
