Duverger Maurice Au. Party politics and pressure groups A comparative introduction Duverger Maurice Au.; Wagoner Robert Tr. - London Nelson 1972 - vii,168p. cm. - Nelson's Political Science Library Ed by K W Watkins . Bibliography at the end of each chapter ISBN: 017 711097 X Source: General Book Subjects--Topical Terms: Political Parties Dewey Class. No.: W,4, L2/TD3