@book{10511,
	author = {Sagredo, Amarilis and Luna, Eduardo and Pontificia  Universidad Católica Madre y Maestra },
	title = {Nociones de lógica simbólica /},
	publisher = {UCMM,},
	year = {1990.},
	series = {Textos},
	address = {Santo Domingo :},
	edition = {8a ed.}
}