Katz, Elihu,  1926-, <br/><br/>
Personal influence:  the part played by people in the flow of mass communications/ 
by Elihu Katz and Paul F. Lazarsfeld with a foreword by Elmo Roper. 
 - 1st Free Press pbk. ed. 
 - New York:  Free Press,  1955. 
 - 400 pages :    illustrations ;   21 cm. 
 - Foundations of communications research. .
<br/><br/> 'A report of the Bureau of Applied Social Research, Columbia University.'  Includes indexes. 
<br/><br/>p. 381-393 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mass media.<br/>Public opinion.