The impact of the union: eight economic theorists evaluate the la bor union movement / John Maurice Clark [et al] ; Edited by David Mc Cord Wright - New York : Harcourt, Brace , 1951, 1956 repr - ix, 405 p. : diagrs ; 22 cm Subjects--Topical Terms: Trade-Unions--------Wages--------Economic policy-------- Dewey Class. No.: 331.88