@book{172143,
	author = {Association of Official Analytical Chemists and Horwitz, William},
	title = {Official methods of analysis of the Association of Official Analytical Chemists /},
	publisher = {Association of Official Analytical Chemists,},
	year = {1975},
	address = {Estados Unidos de América :},
	edition = {12a edición},
	note = {El ejemplar 2 es el suplemento del ejemplar 1}
}