@book{39069,
	author = {Ahlfeld, Federico and Schneider-Scherbina, Alejandro},
	title = {Los yacimientos minerales y de hidrocarburos de Bolivia.},
	publisher = {Min. de Minas y Petroleo,},
	year = {1964.},
	series = {Boletín},
	address = {La Paz :}
}