Modzelewski, Zygmunt   (1900-1954).  <br/><br/>
Poland and the Ruhr question /  
by Zygmunt Modzelewski. Address / by Józef Winiewicz.  
 - New York :   Polish Research and Information Service,  1948.  
 - 18 s. ;  21 cm.  
 - Documents and Reports on Poland ;  no. 4  .