Official methods of analysis of the association of official analytical chemists 

 - 15th ed. 
 - Virginia ;  Association of official analytical chemists, Inc.,  1990. 
 - (various paging) :  ill. ; 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0935584420 
<br/><br/><label>LC Class. No.: </label>QD79.C4  / Of4(B)  1990