International Encyclopedia of unified science  
/ The University of Chicago Press, volume 1, nos., 1-5  
 - Chicago:   The University of Chicago Press,  1955 
 - ix, 339p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science 
<br/><br/><label>Subjects--Index Terms: </label>Encyclopedia  
<br/><br/><label>Universal Decimal Class. No.: </label>R 501   / J5.1