Brown, Robert Michal,  1930- <br/><br/>
Educational media :  a competency-based approach / 
by Robert M. Brown 
 - Columbus, Ohio :  Charles E. Merrill,  1973 
 - vii, 292 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0675089867 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio--visual education<br/>Mass media