@book{214543,
	author = {Vélez Torres, José Ramón.},
	title = {Derecho de contratos :},
	publisher = {Universidad Interamericana de Puerto Rico, Facultad de Derecho , },
	year = {1990.},
	series = {Curso de derecho civil ;},
	address = {San Juan, P.R. :},
	edition = {1st ed.},
	note = {Include index}
}