Gutiérrez Guerra, Jaime.
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. .
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. .