@book{7937,
	author = {Willard, Hobart H. and Deau, John A.},
	title = {Métodos intrumentales de análisis},
	publisher = {CECSA,},
	year = {1971},
	address = {México, D.F. :},
	note = {Trad. de : Instrumental methods of analysis, 4 ed. 1967}
}