The world almanac and book of facts 1991 / 
edited by Mark S. Hoffman. 
 - New York :  World Almanac,  c1990. 
 - 960 p. :  ill. ;  20 cm. 
<br/><br/><label>ISBN: </label>0886875781 
<br/><br/><label>Dewey Class. No.: </label>Ref 031.02 W893 1990