Exton, William <br/><br/>
Audiovisual aids to instruction 
William Exton,Jr.,Captain USNR. 
 - New York  McGraw-Hill Book Co.  1947. 
 - xiii, 344 p.  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Visual instruction.<br/>Audiovisual instruction.