Hyman, Libbie Henrjeta <br/><br/>
The invertebrates: plathhelminther and rhyncbocoela:the acoelomate bilateria, v2 

 - New York  McGraw-Hill  1951 
 - vii, 550 p. 
<br/><br/><label>Dewey Class. No.: </label>592 H997I