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By "Nygren, Kristen M. "
Variation in scales in Dermophis mexicanus (Amphibia, Gymnophiona) : are scales of systematic utility? / Maravalee H. Wake, Kristen M. Nygren.
By: Wake, Marvalee H. - Nygren, Kristen M. - Field Museum of Natural History.
Publication info: Chicago :Field Museum of Natural History,1987.
Contributed by: University of Illinois Urbana Champaign