Gutiérrez Guerra, Jaime. <br/><br/>
The Gran Chaco Boreal war :   A Cursory Summary of the Historical Background and Facts Bearing Upon the Present Conflict. 

 - New York-XXU :   The Bolivian Consulate,   1933. 
 - p. 10-13 
 - Bimestral 
 - Vol. IV, no. 5 (Jul./Ago. 1933) 
 - Bolivia ;   no. 5 .
 - Estados Unidos.   The Bolivian Consulate. .