Evolution in the genus Bufo 
Edited by W. Frank Blair 
 - Austin  University of Texas Press  1972 
 - 459 p.  : ill.; 29 cm. 
<br/><br/><label>ISBN: </label>0292720017 
<br/><br/><label>LCCN: </label>75-185242 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bufo<br/>Evolution