Comstock, George A. <br/><br/>
The evolution of American televisions 
George Comstock 
 - Newbury Park  Sage Publications  1989 
 - 312 p. ; 23 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliographical references and index 
<br/><br/><label>ISBN: </label>0803935528 
<br/><br/><label>LCCN: </label>89-33253 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Television broadcasting--United States--History