The New Encyclopaedia Britannica :  Vol.7 Micropedia. Ready Reference 

 - 15th ed. 
 - Chicago :  Encyclopaedia Britannica, Inc,  1998 
 - 1044 p. 
<br/><br/><label>Subjects--Index Terms: </label>Bách khoa thư 
<br/><br/><label>Dewey Class. No.: </label>030  / NEW(7) 1998