@book{13162,
	author = {Londoño, Nelson and Bedoya, Hernando},
	title = {Geometría analítica y trigonometría /},
	publisher = {Norma,},
	year = {1988.},
	series = {Matemática progresiva},
	address = {Colombia :},
	edition = {2a ed.},
	note = {La biblioteca posee la 11a reimpresión del 1996.}
}