Wells, Martin John. <br/><br/>
Lower animals / 
by Martin Wells. 
 - New York :  McGraw-Hill,  1968. 
 - 255 p. :  ill., (part col.). ;  19 cm. 
<br/><br/>Bibliography: p. 244-249. 
<br/><br/><label>LCCN: </label>68-013140 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates.