@book{1674,
	author = {ESPINOSA CALVO, JESUS ALFREDO. and INSTITUTO TECNOLOGICO DE TUXTLA GUTIERREZ.},
	title = {ELECTRONICA DIGITAL I: },
	publisher = {EL AUTOR},
	year = {1987},
	address = {TUXTLA GUTIERREZ, CHIS.: },
	note = {A LA CABEZA DE LA PORTADA: INSTITUTO  POLITECNICO NACIONAL.}
}