@book{47400,
	author = {Borrero Vintimilla, Antonio, 1924-2016},
	title = {Geografía económica del Ecuador},
	year = {ene./jun. 1973},
	address = {Cuenca},
	url = {http://dspace.ucuenca.edu.ec/bitstream/123456789/4594/3/N%201-2%20enero-junio%201972%20ingreso%2040492.pdf}
}