Welcher, Frank J. <br/><br/>
Standard methods of chemical analysis :  industrial and natural products and noninstrumental methods. 

 - 6th ed. 
 - Princeton :  D.Van Nostrand,  1963. 
 - 2 v. :  il. ;  23 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Química<br/>Metodología<br/>Química analítica
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>543.06