Gabriel, R. H.: The Lure of the Frontier, Yale University Press, New Haven, 1929.
Hicks, John D.: The Federal Union, Houghton Mifflin Co., Boston, 1937.
Johnson, James W.: Along this Way, The Viking Press, New York, 1933.
Jones, H. M.: America and French Culture, University of North Carolina Press, Chapel Hill, 1927.
Lebeson, Anita: Jewish Pioneers in America, Coward-McCann, New York, 1921.
Mariano, John H.: The Italian Contribution to American Democracy, Christopher Publishing House, New York, 1921.
Roberts, Peter: The New Immigration, The Macmillan Co., New York, 1912.
Rose, Philip M.: The Italians in America, George H. Doran Co., New York, 1922.
Sanchez, Nellie Van de Grift: Spanish and Indian Place Names of California, A. M. Robertson, San Francisco, 1914.
Schrader, F. F.: Germans in the Making of America, The Stratford Col., Boston, 1924.