Donaldson, Thomas: The Public Domain, 1881.
Edwards, Richard H.: Immigration, 1909.
Ellwood, Charles A.: Sociology and Modern Social Problems, 1910.
Endicott, William C., Jr.: Immigration Laws, State and National, in Commercial Relations of the United States, 1885–1886. Appendix III, 1887.
Evans-Gordon, W.: The Alien Immigrant, 1903.
Gonnard, Réné: L’Émigration européenne au XIX Siècle, 1906.
Grose, Howard B.: Aliens or Americans? 1906.
Hall, Prescott F.: Immigration, 1906.
Henderson, C. R.: An Introduction to the Study of the Dependent, Defective, and Delinquent Classes, 1893.
Hunter, Robert: Poverty, 1904.