Hough, Emerson. The Passing of the Frontier. Yale University Press, New Haven, Conn. 1918.
Paxson, F. J. History of the American Frontier. Houghton, Mifflin Co., Boston, Mass. 1924.
13. The Jews.—Participating in American life since early colonial days, the Jews make significant contributions to science, industry, music, literature, theatre, law, medicine, and philanthropy.
Browne, Lewis. Stranger Than Fiction. Macmillan Company, N. Y. 1933.
DuBois, R. and Schweppe E. (eds). Jews in American Life. Thomas Nelson and Sons, N. Y. 1935.
Wald, Lillian D. The House on Henry Street. Henry Holt and Co., N. Y. 1915.
14-15. The Slavs.—The Slavs—northern and southern—succeed in making abandoned farms productive and work in our mines, steel mills, automobile factories, packing houses, and forests.
Adamic, Louis. Laughing in the Jungle. Harper and Brothers, N. Y. 1932.
Balch, Emily G. Our Slavic Fellow Citizens. Charities Publication Committee, N. Y. 1910.
Miller, K. D. Peasant Pioneers. Council of Women for Home Missions, N. Y. 1925.