Houghton, Philip Stephen. <br/><br/>
Gears  spur, helical, bevel, internal, epicyclic and worm 
by P. S. Houghton 
 - 3rd ed. revised and reset. 
 - London,  Technical P.  1970. 
 - [624] p.  illus.  26 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0291394019 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gearing.