Helrich Kenneth  Ed <br/><br/>
Official Methods of Analysis of the Association of Official Analytical Chemists  Vol 1 : Agricultural Chemicals  Contaminants  Drugs .-Edn 15 

 - Edn 15 
 -  A O A C, Virginia 
 - pp 684, I-62;   29*23 
<br/><br/><label>Dewey Class. No.: </label>E:3;A/N90/B19761