Interest groups on four continents - Ehrmann, Henry Walter, 1908-; International Political Science Association (Pittsburgh : University of Pittsburgh Press, 1967)
"Result of a round-table conference held by the International Politi cal Science Association at the University of Pittsburgh, September 9-13 , 1957"--P. v.
Reprint. Originally published: Pittsburgh : University of Pittsburgh Press, 1958.
Includes bibliographies and index.
Keywords: Pressure groups -- Congresses