Simmel, Georg..
Conflict / translated by Kurt H. Wolff ; The web of group-affiliations / translated by Reinhard Bendix /
with a foreword by Everett C. Hughes 
. - New York  : Free Press,  1955 
. - 195 p.  21 cm. 
<br/>К.: Бібліогр. в підрядк. прим.