@book{166447,
	author = {Association of Official Analytical Chemists and Williams, Sidney},
	title = {Official methods of analysis of the Association of Official Analytical Chemists  /},
	publisher = { Association of Official Analytical Chemists,},
	year = {1984},
	address = {Arlington, Virginia :},
	edition = {14 edición},
	note = {ej.1: 133996}
}