Webb, J. E. <br/><br/>
Guide to invertebrate animals/ 
J. E. Webb, J. A. Wallwork and J. H. Elgood. 
 - 2nd. ed. 
 - London :  Macmillan Education,  1978. 
 - 305 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label>0333247450 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates--Classification.