Crotalus willardi obscurus
1991
Barker, D.G. 1991. An investigation of the natural history of the New Mexico ridgenose rattlesnake, Crotalus willardi obscurus. 100 p.
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1996
Holycross, A.T. 1996. Recommendations for limiting impacts of prescribed burns on Crotalus willardi obscurus. Unpubl. letter to USFWS. Arizona State University, Department of Zoology, Tempe, AZ. p. 5.
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1995
Holycross, A.T. 1995. Status of the Animas Mountains Population of Crotalus willardi obscurus. Unpubl. Preliminary Report of Activities Conducted Under Professional Service Contract No. 95-516-28 for the New Mexico Department of Game and Fish (NMDGF). Ari
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1999
Holycross, A. T. 1999. A Map of Potential Core Habitat for Crotalus willardi obscurus on Coronado National Forest Lands in Peloncillo Mountains: A Report to Malpai Borderlands Group. Biology Department, Arizona State University, Tempe, AZ, p. 164.
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2001
Smith, L.J., Holycross, A.T., Painter, C.W., Douglas, M.F. 2001. Montane Rattlesnakes and Prescribed Fire. The Southwestern Naturalist. 46(1): 54-61
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