Inventions and discoveries:  communication/  -- Chicago:  World Book, Inc.,  2009. <br/> col.: ill.;  27. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>9780716603825 <br/><br/><label>Subjects--Topical Terms: </label><br/>Communication--Technological innovations--History--Juvenile literature.<br/><br/><label>Dewey Class. No.: </label>HS Ref 302.2 C737 2009