by Allen, D.H, Franzreb, K.E, Escano, R.E.F
Published in Wildlife Society bulletin (01.07.1993)

by Walker, J.S. (USDA Forest Service, Atlanta, GA), Escano, R.E.F
Published in General technical report INT - U.S. Department of Agriculture, Forest Service, Intermountain Research Station (USA) (01.12.1992)

by Lyon, L.J, Edge, W.D, Kuck, L, Leege, T.A, Lonner, T.N, Marcum, C.L, Scott, M.D, Escano, R.E.F, Light, J.T, Pfister, R.D
Published in Proceedings of the 1984 Western States and Provinces Elk Workshop, April 17-19, 1984, Edmonton, Alberta / editor & chairman, R. Wayne Nelson (1985)