Kehl, George Louis. <br/><br/>
The principles of metallographic laboratory practice / 
by George L. Kehl. 
 - 1st ed. 
 - New York,  McGraw-Hill,  1939. 
 - xi, 359 p.  illus., tables, diagrs.  24 cm. 
 - Metallurgical texts .
<br/><br/><label>Subjects--Topical Terms: </label><br/>METALOGRAFIA
<br/><br/><label>Universal Decimal Class. No.: </label>669