@book{1735,
	author = {GUZMAN DIAZ, MARCIAL. and CENTRO NACIOANAL DE ENSEÑANZA TECNICA  INDUSTRIAL.},
	title = {CONTROL DE EFICIENCIA OPERACIONAL EN LOS  PUERTOS MEXICANOS/ },
	publisher = {EL AUTOR},
	year = {1976},
	address = {MEXICO: }
}