Ludwig, Oswald A. <br/><br/>
Metalwork :  technology and practice / 
by Oswald A. Ludwig 
 - 2nd ed. 
 - Bloomington, Ill. :  McKnight & McKnight,  c1947 
 - 397 p. :  ill. ;  28 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> USD 6.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machine-shop practice<br/>Metal-work
<br/><br/><label>Dewey Class. No.: </label>621.75