@book{1867,
	author = {PEREZ RODRIGUEZ, ANGEL SEIN. and INSTITUTO TECNOLOGICO DE TUXTLA GUTIERREZ.},
	title = {ACUSTICA 1 : },
	year = {1991},
	address = {TUXTLA GUTIERREZ, CHIS. ; EL AUTOR},
	note = {A LA CABEZA DE LA PORTADA: INSTITUTO  POLITECNICO NACIONAL.}
}