King, Martin Luther, Jr., 1929-1968. The trumpet of conscience [by] Martin Luther King, Jr. - [1st U.S. ed.] - New York, Harper & Row [1968, c1967] - xii, 78 p. 22 cm. - Massey lectures, 1967 . Subjects--Geographic Terms: United States--Social conditions--1945- LC Class. No.: E185.97 / .K5 1968 Dewey Class. No.: 309.1/73