The new Encyclopaedia Britannica (vol-21) / 
Robert P. Gwinn, Charles E. Swanson and Philip W. Goetz. 
 - 15th ed. 
 - Chicago :  Encyclopedia Britannica,  c1985. 
 - 968p. :  ill. ;  29 cm. 
<br/><br/>Includes bibliography. 
<br/><br/>
<br/><br/><br/>english 
<br/><br/><label>LCCN: </label>48003431  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries.
<br/><br/><label>LC Class. No.: </label>AE5  / .E363 1948 
<br/><br/><label>Dewey Class. No.: </label>031/BEE