Gordon, George N <br/><br/>
Videocassette technology in American education / 
George N. Gordon and Irving A. Falk 
 - Englewood Cliffs, N.J. :  Educational Technology Publications,  1972 
 - xiv, 161 p. ;  23 cm. 
<br/><br/>p. 153-156. 
<br/><br/><label>ISBN: </label>0877780358 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Video tapes in education