Trowbridge, N. E. <br/><br/>
The new media challenge / 
by N. E. Trowbridge 
 - London :  Macmillan,  1974 
 - 118 p. :  ill. ;  22 cm. 
 - Language guides .
<br/><br/>Bibliography: p. 114-116 
<br/><br/><label>ISBN: </label>0333130790 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education
<br/><br/><label>Dewey Class. No.: </label>371.33