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

by Ellen Churchill Semple

Eleventh Census, Report on the Indians, pp. 34-35. Washington, 1894.

H. Helmolt, History of the World, Vol. III, p. 42. New York, 1902-1906.

Ratzel, History of Mankind, Vol. II, pp. 279-283, London, 1896-98.

Jerome Dowd, The Negro Races, Vol. I, pp. 47-48, 61-62. New York, 1907.

Sweden, Its People and Its Industries, p. 93. Edited by G. Sundbärg, Stockholm, 1904.

Sir John Lubbock, Prehistoric Times, pp. 589-593. New York, 1872.

G.P. Marsh, The Earth as Modified by Human Action, New York, 1877.

W.Z. Ripley, Races of Europe, pp. 261-267. New York, 1899.

Ibid., pp. 475-485.

Ratzel, History of Mankind, Vol. II, pp. 402-405. London, 1896-1898.