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6.0 References <br />Colorado Division of Parks and Wildlife (CPW). 2012. Species of Concern Website. <br />http:/ /wildlife state co us/ WildlifeSpecies /SpeciesOfConcern /Amphibians /Pages /AmphibiansOfC <br />oncern.aspx. Accessed August 29, 2012. <br />Corn, P. S. and J. C. Fogleman. 1984. Extinction of montane populations of the northern leopard frog <br />(Rana pipiens) in Colorado. Journal of Herpetology 18(2):147 -152. <br />Fitzgerald, J.P, C.A. Meaney, and D.M. Armstrong. 1994. Mammals of Colorado. Denver Museum of <br />Natural History and University Press of Colorado. 467 pp. <br />Hammerson, G.A. 1999. Amphibians and Reptiles in Colorado. 2nd edition. University Press of <br />Colorado and Colorado Division of Wildlife. 484 pp. <br />Kingery, Hugh, editor. 1998. Colorado Breeding Bird Atlas. Colorado Bird Atlas Partnership and <br />CDOW. Denver, CO. <br />Lyon, L.J. 1979. Habitat effectiveness for elk as influenced by roads and cover. Journal of Forestry <br />77:658 -660. <br />Natural Diversity Information Source. 2012. http: / /ndis .nrel.colostate.edu /index.html . Accessed 29 <br />August 2012. <br />Stebbins, R. C. 1966. A Field Guide to Western Reptiles and Amphibians. Houghton Mifflin Company, <br />Boston. 279 pp. <br />U.S. Fish and Wildlife Service. 2012. Colorado Field Office County List, Accessed August 29, 2012. <br />(http: / /ecos.fws.gov /ipac/ wizard /trustResourceList!prepare action). <br />M <br />