Kuczynski, R., “The Fecundity of the Native and Foreign Born Population in Massachusetts,” Quarterly Journal of Economics, November, 1901, February, 1902. “Die Einwanderungspolitik und die Bevölkerungsfrage der Vereinigten Staaten von Amerika,” Volkswirthschaftliche Zeitfragen. Berlin, 1903.

Lazare, Bernard, Antisemitism, Its History and Causes. New York, 1903.

Library of Congress, Select List of References on the Negro Question (1903). List of Works relating to the Germans in the United States (1904). Select List of References on Chinese Immigration (1904). Fourteenth Amendment. List of Discussions of Fourteenth and Fifteenth Amendments with Special Reference to Negro Suffrage (1906). List of References on Naturalization (1907).

Lodge, Henry Cabot, Historical and Political Essays. Boston, 1892.

Lord, Trenor, and Barrows, The Italian in America. New York, 1905. Especially Italians in American agriculture.

Mallock, W. H., Aristocracy and Evolution. New York, 1898.

Marshall, Alfred, Principles of Economics. New York, 1891.

Merriam, G. S., The Negro and the Nation. New York, 1906.

Muirhead, James F., The Land of Contrasts. London and New York, 1900.