found: Gorham:p. 39.
found: Inventory methods for tailed frog and Pacific giant salamander, c2000, via WWW, Sept. 4, 2001:table of contents (Tailed Frog, Ascaphus truei)
found: ITIS, Sept. 4, 2001(Ascaphus truei, Tailed frog)
found: Amphibian species of the world, via WWW, Sept. 4, 2001(Ascaphus truei. English names: American Discoglossoid Toad, Tailed Frog, California Tailed Frog, Rocky Mountain Tailed Frog, Olympic Tailed Frog. Syn.: Ascaphus truei truei, Ascaphus truei californicus, Ascaphus truei montanus, Ascaphus truei truei)
found: AmphibiaWeb, Sept. 4, 2001(Ascaphus truei, Tailed Frog; Ascaphus montanus)
found: Checklist of amphibian species and identification guide, via WWW, Sept. 4, 2001(Tailed Frog - Ascaphus truei)
