@book{35239,
	author = {Purcell, Edwing Joseph. and Ariza, Victor D. ; tr.},
	title = {Cálculo y geometria analitica /},
	publisher = {Ed. Norma,},
	year = {1965.},
	address = {Cali :},
	note = {Apendice (p. 687-725) \Respuestas a los ejercicios (p. 727-760)}
}