Walber, Warren F. <br/><br/>
General zoology 
Claude A. Villee, Warren F. Walber and Robert D. Barnes 
 - 4th ed. 
 - Philadelphia  W. B. Saunders  1973 
 - xviii, 912p.: ill.; 27cm. 
<br/><br/><label>Dewey Class. No.: </label>591  / VIL