Welcher, Frank J. <br/><br/>
Standard method of chemical analysis 
by Frank J. Welcher 
 - New York  Van Nostrand Reinhold Company  1966 
 - v.:ill.;  22cm.- 
<br/><br/> vol. 3Pt.A: Instrumental methods  vol. 3PtB: Instrumental methods  
<br/><br/><label>Dewey Class. No.: </label>543.08  / WEL