Truman, David B. <br/><br/>
The governmental process :  political interests and public opinion / 
David B. Truman 
 - New York :  Alfred A. Knopf,  1951 
 - 544 p. ;  22 cm. 
<br/><br/> Includes indexes 
<br/><br/>References : p. 537-544 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lobbying<br/>Public opinion--United States