Buchsbaum, Ralph Morris,  1907- <br/><br/>
Animals without backbones :  an introduction to the invertebrates / 
Ralph Buchsbaum 
 - Harmondsworth :  Penguin Books,  1966 
 - 401 p . :  ill. ;  18 cm. 
<br/><br/>'Further knowledge': p. 346-376 Includes bibiliographical refernces and indexes 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates