Hugh Armstrong Clegg. General union in a changing society : a short history of the National Union of General and Municipal Workers, 1889-1964 / by H. A. Clegg. The agricultural lock-out of 1874 : with notes upon farming and farm-labour in the eastern counties / by Frederick Clifford. Labour in the coal-mining industry (1914-1921) / by G. D. H. Cole. Trade unionism on the railways : its history and problems / by G. D. H. Cole and R. Page Arnot. The Woodworkers, 1860-1960 / by T. J. ConnellyWorld Microfilms Publicationsc1973