Duggan, Stephen. <br/><br/>
The causes of uinternational wars. 

 - New York-US :   Institute International Education,   1937. 
 - páginas 3-4 
 - Irregular 
 - Vol. 12, no. 7(Apr. 1937) 
 - News. Bulletin ;   no. 7 .
 - Institute of International Education. .