Note O — APPENDIX IV. Membership Statistics.
Reading edition
Sources: Proceedings 2nd I. W. W. Convention, p. 43; Third I. W. W. Convention, Official Report No. 1, p. 2; Report of the I. W. W. to the Stuttgart International Socialist Congress, Industrial Union Bulletin, August 10, 1907, p. 3, col. 3; Massachusetts Bureau of Labor and Industry, Annual Report on Labor Organizations, 2nd to 7th, inclusive (1909-1914); The Industrial Worker, May 14, 1910, p. 2, and Jan. 5, 1911, p. 2; Marot, op. cit., Appendix.