The Ukraine, 1917-1921: a study in revolution /
editor : Taras Hunczak ; with the assistance of John T. von der Heide 
. - Cambridge : Harvard University Press,  1977 
. - viii, 426 p.  24 cm. 
 - Monograph series / Harvard Ukrainian Research Institute .
<br/><label>  ISBN: </label>0-674-92009-0