How television ratings work  [videorecording] / 
Instructional Video ; produced, narrated and edited by Dr. Laurence Jankowski 
 - 1 videodisc (DVD) (20 min.) :  sd., col. ;  12 cm. 
 - Mass media series .
<br/><br/> Title from title screen 
<br/><br/> Describes how television ratings are determined by using randomly selected households across America. Shows how sampling takes place and how homes are selected to participate 
<br/><br/><label>ISBN: </label> RM307.63 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Television programs--Rating.<br/>Television.