Bleich, V.C., Chun, C.S.Y., Anthers, R.W., Evans, T.E. and Fischer, J.K. 2001. VISIBILITY BIAS AND DEVELOPMENT OF A SIGHTABILITY MODEL FOR TULE ELK. Alces: A Journal Devoted to the Biology and Management of Moose. 37, 2 (Jan. 2001), 315–327.