Hyman, Libbie Henrietta. <br/><br/>
The invertebrates :  Echinodermata / 
Libbie Henrietta Hyman. 
 - New York :   McGraw-Hill,   c 1955. 
 - Vols. :   ill. ;   21 cm. 
<br/><br/>V. 4- The coelomate Bilateria ;  
<br/><br/>   
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates.
<br/><br/><label>Dewey Class. No.: </label>592 / H997i