Willard, Hobart H.  1881-1974. <br/><br/>
Instrumental methods of analysis, 

 - [3d ed.]. 
 - Princeton, N.J.,  Van Nostrand  [1958] 
 - 626 p.  il.  24 cm. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Instrumental analysis.<br/>Análisis instrumental