@book{5641,
	author = {Villagrán Kramer, Francisco and Monteforte toledo, Mario. Prolg},
	title = {Integración económica Centroamericana:},
	publisher = {Universitaria,},
	year = {1967},
	series = {Estudios Universitarios, Vol. 4},
	address = {Guatemala:},
	edition = {1aed.}
}