Carl E. Bock, Hobart M. Smith, Jane H. Bock, The Effect of Livestock Grazing upon Abundance of the Lizard, Sceloporus scalaris, in Southeastern Arizona, Journal of Herpetology, Vol. 24, No. 4 (Dec., 1990), pp. 445-446
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Bock et al. (1990) studied this question.
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