Duggan, Stephen. <br/><br/>
Omnia mutabtur, et nos mutamur in illis. 

 - New York-US :   Institute International Education,   1935. 
 - páginas 3-5 
 - Irregular 
 - Vol. 10, no. 7(Apr. 1935) 
 - News. Bulletin ;   no. 7 .
 - Institute of International Education. .