@book{31452,
	author = {Perez, Concepcion},
	title = {Libro de ejercicios de Espa�ol, Spanish one-two /},
	publisher = {U.S.T. Cooperative,},
	year = {1978-83.},
	address = {Manila :},
	edition = {Rev. ed},
	note = {Includes appendices.}
}