McKown, Harry Charles <br/><br/>
Educación audio-visual 
por Harry C. McKnown y Alvin B. Roberts. 
 - México  U.T.E.H.A.  c1954. 
 - 581 p. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio--Visual education.
<br/><br/><label>LC Class. No.: </label>LB1043  / .M35 1954