@book{207550,
	author = {Maldonado Jimenez, Ruben.},
	title = {Hasta cuándo? :},
	publisher = {Ediciones Nueva Provincia ,},
	year = {c1998.},
	address = {San Juan, P.R. :},
	edition = {1a ed.},
	note = {Thesis (doctoral) -- Universidad de Puerto Rico, 1996.}
}