Jewkes, John,  1902- <br/><br/>
The sources of invention 
by John Jewkes, David Sawers, Richard Stillerman 
 - 2d ed. [rev. and enl.] 
 - New York  W. W. Norton  [c1969] 
 - 372 p.  ports.  20 cm 
 - The Norton library N502 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions
<br/><br/><label>Dewey Class. No.: </label>608.7