Buchsbaum, Ralph Morris,  1907- <br/><br/>
Animals without backbones :  an introduction to the invertebrates / 
Ralph Buchsbaum. 
 - 2nd ed. 
 - Chicago :  University of Chicago Press,  1976. 
 - xi, 392 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0226078701 
<br/><br/><label>LCCN: </label>79104494  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates.