The Bolivia railway company :   Report for the year 1940. 

 - Washington-US :   Bolivian embassy,   1941. 
 - páginas 22-23:   ilustraciones blanco y negro 
 - Bimestral 
 - Vol. VIII, no.6 (Sep/Oct 1941) 
 - Bolivia ;   no.6 .
 - Bolivian embassy. .