Twentieth century :  an almanac ; edited by Robert H. Ferrell. 

 - London :  Harrap,  1986. 
 - 512 p. :  ill. ;  23 cm. +     maps. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0 245 54393 7 :  (N.A.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Year book -- 20th century.<br/>Almanacs -- 20th century.<br/>Reference book -- 20th century.<br/>Reference source -- 20th century.
<br/><br/><label>Dewey Class. No.: </label>RR 909.82