Polcyn, Kenneth A. <br/><br/>
An educator's guide to communication satellite technology / 
by Kenneth A. Polcyn 
 - Washington :  Information Center on Instructional Technology Academy,  1973 
 - 99 p. :  ill. ;  30 cm. 
<br/><br/><label>LCCN: </label>73-89216 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Television in education<br/>Artificial satellites in telecommunication