"The Mexican policy of southern leaders under Buchanan's administration."; "Callahan, James Morton, 1864-1956."; "Mexico--Foreign relations--United States.", "United States--Foreign relations--Mexico."; "Callahan, James Morton, 1864-1956."; "1912"; "Article reprint from: Annual Report of the American Historical Association, 1910, p. 133-151. "; ""; "P116"; "pec"; "United States--Foreign relations--Mexico.", "Mexico--Foreign relations--United States."; "14256"; .