Studies in Modern Socialism. By Edwin Brown, D.D. Appleton & Co., New York.
Dynamic Sociology. By Lester F. Ward. D. Appleton & Co., New York.
Labor and Life of the People. Vols. 1 & 2: East London. By Charles Booth. Williams & Norgate, London, 1889 & 1892.
Thirty Years of Labor: 1859 to 1889. By T.V. Powderly.
Das Kapital. By Karl Marx.
How the Other Half Live. By Jacob Riis. Charles Scribner's Sons, New York.
General Reports and Review Articles on the questions involved.