@book{4186,
	author = {Zavala, Silvio Arturo, },
	title = {Zaala, Silvio Arturo, 1909},
	publisher = {Universitaria,},
	year = {1967},
	series = {Estudios Universitarios, Vol. 5},
	address = {Guatemala:},
	edition = {1a. ed.}
}