Jewkes John et al <br/><br/>
Sources of invention 
Jewkes John et al 
 -  1958 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics-Industry
<br/><br/><label>Dewey Class. No.: </label>X90g(Y), J8