SUPPLEMENT 



TO THE 



BIBLIOGRAPHY 



OF THE 



NORTH AMERICAN LAND TORTOISES 



(GENUS GOPHERUS) 



o 



JOHN F. DOUGLASS 



OEPT. ECOLOGY 4 EVOLUTIONARY BIOLOGY 

 UNIVERSITY OF MICHIGAN 



In remembrance 

 of 

 Richard Archbold 

 (1907-1976) 



SMITHSONIAN 

 HERPETOLOGICAL INFORMATION 

 SERVICE 

 NO. 39 



1977 



Division of Reptiles 4 Amphibians 

 National Museum of Natural History 

 Washington, DC 20560 



