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GEOGRAPHICAL VOICE VARIABILITY IN ANIMALS AS AN ECOLOGICAL 

 AND EVOLUTIONARY PROBLEM 



by G. N. Simkin and V. D. Il'ichev 



Zoologicheskii Zhurnal 

 (Zoological Journal) 



volume 44, no. 4, 

 pp. 483-493 



1965 



Translated from Russian for the National Science Foundation 

 Office of Science Information Service 



Reviewed by Wesley Lanyon, Paul Slud, and 

 Richard Zweifel 



Edited by James A. Peters 



SMITHSONIAN HERPETOLOGICAL INFORMATION SERVICES 

 1967 



Additional copies available frc 



Secretary 



Division of Reptiles and Amphibians 

 United States National Museum 

 Washington, D. C. 20560 



