The changing American voter / Norman H. Nie, Sidney Verba, John R. Petrocik. Nie, Norman H. Verba, Sidney, joint author. Petrocik, John R., 1944- joint author. Elections United States. Voting United States. Public opinion United States. JK1976 .N48 1979b 324.20973 19 NIC "A Twentieth Century Fund study." Includes bibliographical references and index. Cambridge, Mass. : Harvard University Press, 1979. 1979. 1979 Text xx, 430 p. : eng United States. United States. United States.