Liebert, Robert M, <br/><br/>
The early window :  effects of television on children and youth / 
by Robert M. Liebert and Joyce Sprafkin. 
 - 3a ed. 
 - 306 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Televisión--Estados Unidos.
<br/><br/><label>Dewey Class. No.: </label>305.25  / L716e 1988