The Drift of Civilization /  Textual Documents 
George Allen and Unwin Ltd. 
 - 1st ed. / 
 - London :  George Allen and Unwin Ltd ,  1930. 
 - 254p. ;  20cm. 
<br/><br/><label>Subjects--Index Terms: </label>History-Civilization G-Geography 
<br/><br/><label>Dewey Class. No.: </label>901  / Ge 24 D