Colvin, Fred H.  1867-1965. <br/><br/>
Gear cutting practice :  methods of producing gears for commercial use / 
by Fred H. Colvin and Frank A. Stanley. 
 - 3d ed. 
 - New York,  McGraw-Hill  [c1950] 
 - xii, 532 p.  illus.  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENGRANAJES
<br/><br/><label>Universal Decimal Class. No.: </label>621.83