By Powell, G. Bingham.
Cambridge, Mass. Harvard University Press 1982 .
xi, 279 p. 25 cm..
0674166868

By Dahl, Robert Alan.
New Haven Yale University Press 1973 .
411 p. 25 cm..
0300013906

By Verba, Sidney.
Cambridge, Eng. | New York Cambridge University Press 1978 .
xxi, 394 p. , Includes index. 24 cm..
0521219051

Washington, D.C. American Enterprise Institute for Public Policy Research 1981 .
367 p. 23 cm..
0844734055 | 0844734039

Washington, D.C. American Enterprise Institute for Public Policy Research 1978 .
250 p. 23 cm..
0844733180