@book{2316,
	author = {HELRICH, KENNETH, ED.},
	title = {OFFICIAL METHODS OF ANALYSIS OF THE  ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS/ },
	publisher = {ASSOCIATION OF OFFICIAL  ANALYTICAL CHEMISTS},
	year = {1990},
	address = {VIRGINIA: },
	edition = {15},
	note = {CONTENIDO : V.1.AGRICULTURA CHEMICALS   CONTAMINANTS ; DRUGS. -- V.2.FOOD   COMPOSITION ; ADDITIVES ; NATURAL  CONTAMINANTS.}
}