Political parties, interest groups, and public policy group influence in American politics - Ippolito, Dennis S.; Walker, Thomas G. 1945- (Prentice-Hall, 1980)
Keywords: Groupes de pression - États-Unis; Grupos de presión - EE.UU; Overheidsbeleid; Partis politiques - États-Unis; Politieke partijen; Pressiegroepen; Partei; Politik; Political parties -- United States; Pressure groups -- United States; Interessenverband; USA