Encyclopedia of knowledge  / 
Grolier. 
 - Danbury, Conn. :  Grolier Incorporated,  1993. 
 - 20 v. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0717253007 (set)  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries.