Cressy, Edward <br/><br/>
Discoveries and inventions of the  twentieth century 

 - 2nd 
 - London  George Routledge  1923 
 - xxiii, 458 p. 
<br/><br/> With illustration 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions<br/>Technologies
<br/><br/><label>Dewey Class. No.: </label>608  / C864d