Buchsbaum, Ralph Morris,    1907- <br/><br/>
Animals without backbones :    an introduction to the invertebrates /  
by Ralph Buchsbaum ... 
 - Chicago, Ill. :    The University of Chicago press,    1938 
 - ix, 1 l., 371 p. :    ill., plates, diagrs. ;    24x17 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Invertebrates
<br/><br/><label>Dewey Class. No.: </label>592