1. R. C. O. Matthews, C. H. Feinstein and J. C. Odling-Smee, British economic growth 1856–1973 (Cambridge 1982), 84
2. Britain 1900–45: a survey;Von Tunzelman;The economic history of Britain since 1700,1981
3. Regional unemployment patterns in Britain, 1851–1914; a study of the “Trade Union Percentages of Unemployment”, with special reference to engineering workers;Southall,1984
4. Seventeenth Report on Trade Unions, PP 1912 [Cd.6109] XLVII, lxxxvi–vii