Ratzel, History of Mankind, Vol. I, pp. 174-177. London, 1896-98.
Ibid., Vol. I, pp. 178-179.
Ibid., Vol. I, pp. 157-161, 165.
Henry Dyer, Dai Nippon, pp. 250-257, 266. New York, 1904.
Elisée Reclus, Europe, Vol. I, p. 337. New York, 1886. Hereford George, Historical Geography of the British Empire, pp. 118-119. London, 1904.
D.G. Hogarth, The Nearer East, p. 244. London, 1902.
Dr. A. Philippson, The Greek Islands of the Aegean, Scottish Geographical Magazine, Vol. XIII, p. 488. 1897.
Jensen, Die Nordfrieschen Inseln, p. 133. 1891.
Malthus, Essay on Population, Book I, chap. V, p. 67. London, 1826. This whole chapter on "Checks to Population in the Islands of the South Seas" is valuable.
Boyd Alexander, From the Niger to the Nile, Vol. II, pp. 108-110. London, 1907.