Childs, James J. <br/><br/>
Principles of numerical control 
James J. Childs 
 - 3rd ed. 
 - New York, N.Y  Industrial Press  c1982 
 - xii, 302 p.  ill.  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machine-tools--Numerical control
<br/><br/><label>Dewey Class. No.: </label>621.9  / 023