Dudley, Darle W. <br/><br/>
The evolution of the Gear Art /  
by Darle W. Dudley.  
 - Washington:  American Gear Manufacturers Association,  1969 
 - 93 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENGRANAJES-HISTORIA<br/>HISTORIA DE LOS ENGRANAJES<br/>GEAR<br/>GEAR-HISTORY
<br/><br/><label>Universal Decimal Class. No.: </label>621.83(094) D865