Geographical meeting at baton rouce and philadelphia, december, 1940 :   Thirty seventh annual meeting of the association of american geographers. 

 - New York-US :   Geografical record,   1941. 
 - páginas 315-318 :   Ilustraciones blanco y negro 
 - Irregular 
 - Vol. XXXI, no. 2(Apr. 1941) 
 - The Geographical Review ;   no. 2 .
 - The Geographical Review. .