Buchsbaum, Ralph. <br/><br/>
Animals without backbones ; an introduction to the invertebrates 

 - Rev. ed. 
 - Chicago :  The University,  1961 (c.1948) 
 - 405 p.  : ilus. 
<br/><br/><label>LCCN: </label>25557 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrados.
<br/><br/><label>Dewey Class. No.: </label>592  / B8 1948