Jewkes, John.   <br/><br/>
Sources of invention / 
John Jewkes, David Sawers and Richard Stillerman. 
 - London :  Macmillan,  c 1958. 
 - xii, 428 p. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>345  345 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions.<br/>Information Systems.
<br/><br/><label>Dewey Class. No.: </label>608 / J556s