A unified theory of voting directional and proximity spatial models / Samuel Merrill III, Bernard Grofman. Merrill, Samuel, 1939- Grofman, Bernard. Social choice. Voting United States. Voting Norway. Voting France. 324.91821 21 MEU Includes bibliographical references and index. New York : Cambridge University Press, 1999. 1999. 1999 Text xv, 213 p. : eng United States. Norway. France.