Influences of Geographic Environment / On the Basis of Ratzel's System of Anthropo-Geography

by Ellen Churchill Semple

Ibid., Vol. II, pp. 219-223, 230.

W.Z. Ripley, Races of Europe, pp. 276-277. New York, 1899.

Hodgkin, Italy and Her Invaders, Vol. II, pp. 214-219. Oxford, 1892.

Ratzel, History of Mankind, Vol. II, p. 296. London, 1896-1898.

McGee and Thomas, Prehistoric North America, pp. 408-412, Vol. XIX of History of North America. Philadelphia, 1905.

Hugh R. Mill, International Geography, p. 858. New York, 1902.

Roscher, National-Oekonomik des Ackerbaues, pp. 44-48. Stuttgart, 1888.

Cyrus Thomas, The Indians of North America in Historical Times, p. 261. Vol. II of History of North America, Philadelphia, 1903.

Roosevelt, Winning of the West, Vol. I, pp. 134-135, 250. New York, 1895. Justin Winsor, The Westward Movement, p. 16. Boston, 1899.

Eleventh Census, Report on the Indians, p. 54. Washington, 1894.