James Bryce, Impressions of South Africa, pp. 78-82, 99. New York, 1897.
Anatole Leroy-Beaulieu, The Empire of the Tsars, Vol. I, map p. 80. New York, 1893.
Census of the Philippine Islands, Vol. I, pp. 412-413, 481, 464, 562., Washington, 1905.
Ibid., Vol. I, p. 416.
Ratzel, History of Mankind, Vol. III, p. 449. London, 1896-1898.
P. Ehrenreich, Die Eintheilung und Verbreitung der Völkerstämme Brasiliens, Petermanns Mittheilungen, Vol. 37, pp. 88-89. Gotha, 1891. Helmolt, History of the World, Vol. I, p. 185, map p. 189. New York, 1902-1906.
John Richard Green, The Making of England, Vol. I, chap. I. London, 1904.
H. J. Mackinder, Britain and the British Seas, p. 189. London, 1904. W. Z. Ripley, Races of Europe, pp. 312-315, map. New York, 1899.
D. G. Hogarth, The Nearer East, p. 152. London, 1902. W. Z. Ripley, Races of Europe, pp. 402, 404, map. New York, 1899.
Ibid., pp. 117, 404-405, 409-419.