Cowling Welch, Edward J.  <br/><br/>
Designing valve gearing /  
Edward J. Cowling Welch 
 - London :   E. & F. N. Spon,   1890. 
 - 283 p. ;   figuras  
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENGRANAJES<br/>MOTORES
<br/><br/><label>Universal Decimal Class. No.: </label>621.81