Brooks, R. R. R. (1939). Unions of their own choosing: An account of the National labor relations board and its work. Yale University Press ; H. Milford, Oxford University press.

Brooks, Robert R. R. Unions of Their Own Choosing: An Account of the National Labor Relations Board and Its Work. New Haven : London: Yale University Press ; H. Milford, Oxford University press, 1939.

Brooks, Robert R. R. Unions of Their Own Choosing: An Account of the National Labor Relations Board and Its Work. Yale University Press ; H. Milford, Oxford University press, 1939.