@book{54620,
	author = {Luisa María Altagracia, and Bajarán de Rodríguez, Argentina,},
	title = {Ciencias naturales ; ciencias sociales  3º curso:},
	publisher = {EDYCA ,},
	year = {1978},
	series = {Educación Santillana},
	address = {Santo Domingo :}
}