Warren, Kenneth F. <br/><br/>
In defense of public opinion polling / 
Kenneth F. Warren 
 - Colorado :  Westview Press,  2001       
 - xiii, 368 p. 
<br/><br/><label>ISBN: </label>0813397936 
<br/><br/><label>LC Class. No.: </label>HM 1236 W291 2001