Parkinson, A. C. <br/><br/>
Thread grinding and measurement / 
A. C. Parkinson and W. H. Dawney. 
 - London :  I. Pitman,  c1949. 
 - x, 227 p. :  illus. ;  23 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gear-cutting machines.
<br/><br/><label>Dewey Class. No.: </label>621.94  / PAT 1949