Official methods of analysis of the Association of Official Analytical Chemists   / edited by Kenneth Helrich 

 - Arlington, Virginia:  A.O.A.C.  , 1990 
 - 2 v.:  29 cm. 
<br/><br/><label>ISBN: </label>0-935584-42-0 
<br/><br/><label>Subjects--Index Terms: </label>Alimentos análisis Química analítica Metodología Normas