Khanna, P.N. <br/><br/>
Audio-visual training materials  a source guide  National Council of educational Research and Training 
P.N. Khanna 
 - New Delhi  Secretary Ntl. Council of Educational Research and Training  1971 
 - xviii, 199 p.  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education<br/>Audio-visual training materials - Hand books, manuals.
<br/><br/><label>Dewey Class. No.: </label>371.835  / KHA-A