Dillon, Lawrence S. <br/><br/>
Animal variety :  an evolutionary account 
Lawrence S. Dillon 
 - 3d ed. 
 - Dubuque, Iowa :  W. C. Brown Co.,  1976 
 - viii, 199 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0697045234 
<br/><br/><label>LCCN: </label>75-17438 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Variation (Biology)<br/>Evolution