Hegner, Robert W. <br/><br/>
College zoology 
/ Robert W.Hegner , Karl A.Stiles,aut. 
. - 7th ed 
. - New York  : The Macmillan Company, cop.1959
. - X-726p.  : ill.  ; 26 cm 
<br/><br/>Index 
<br/><br/><label>Source: </label>173231  don 
<br/><br/><label>Universal Decimal Class. No.: </label>