Childs, James J., <br/><br/>
Principles of numerical control / 
James J. Childs. 
 - 3rd ed. 
 - New York, N.Y. :  Industrial Press,  1982. 
 - xii, 302 pages :  illustrations ;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0831111356 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machine tools--Numerical control.