Walker, W. F.  <br/><br/>
Engineering productivity :   Volume I: Tools, machinesand processes 

 - London :   Crosby lockwood,   1963. 
 - 257 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MAQUINAS HERRAMIENTAS<br/>TALADROS<br/>FRESADORAS
<br/><br/><label>Universal Decimal Class. No.: </label>621.9