(4) Bradford, Gamaliel, Jr. Types of American Character. New York, 1895.
(5) Kellogg, Walter G. The Conscientious Objector. Introduction by Newton D. Baker. New York, 1919.
(6) Hapgood, Hutchins. Types from City Streets. New York, 1910.
(7) Bab, Julius. Die Berliner Bohème. Berlin, 1905.
(8) Cory, H. E. The Intellectuals and the Wage Workers. A study in educational psychoanalysis. New York, 1919.
(9) Buchanan, J. R. The Story of a Labor Agitator. New York, 1903.
(10) Taussig, F. W. Inventors and Money-Makers. New York, 1915.
(11) Stoker, Bram. Famous Impostors. London, 1910.
D. Community Organization
(1) Galpin, Charles J. "Rural Relations of the Village and Small City," University of Wisconsin Bulletin No. 411.