Buchsbaum, Ralph Morris,  1907- <br/><br/>
Animals without backbones :  an introduction to the invertebrates / 
by Ralph Buchsbaum. 
 - 2nd ed. 
 - Chicago :  University of Chicago Press,  1948. 
 - xi, 405 p. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Invertebrates.