Graf, Rudolf F. <br/><br/>
How it works, illustrated :  everyday devices and mechanisms / 
by Rudolf F. Graf and George J. Whalen and Illustrated by Farmlett, Parsanti, [and]Wood 
 - London :  Souvenir Press,  1975 
 - viii, 184 p. :  ill. ;  25 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0285621734 :  PND 4.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology--Popular works
<br/><br/><label>Dewey Class. No.: </label>620