Houghton.P.S. <br/><br/>
Gears.(Spurhelicalbevel &Worms). 

 - 1st Ed. 
 -  Temple Press Ltd. London.  1956 
 -  24 cm. 
<br/><br/><br/>Text in English 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>MECH
<br/><br/><label>Index Terms--Genre/Form: </label><br/>M-23
<br/><br/><label>Dewey Class. No.: </label> / HOU