Hanna, Charles A.: The Scotch-Irish, 1902.
King, Bolton, and Okey, Thomas: Italy To-day, 1901.
Lord, Eliot, Trenor, J. D., and Barrows, S. J.: The Italian in America, 1905.
MacLean, J. P.: Settlements of Scotch Highlanders in America, 1900.
Maguire, J. F.: The Irish in America, 1868.
Nelson, O. N.: History of Scandinavians and Successful Scandinavians in the United States, 1900.
Peters, Madison C.: The Jews in America, 1905.
Rubinow, I. M.: Economic Condition of the Jews in Russia, United States Bureau of Labor, Bulletin No. 72, 1907.
Seward, George F.: Chinese Immigration, 1881.
Sparks, E. E.: The Chinese Question, in National Development, 1877–85, p. 229, 1907.