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

by Ellen Churchill Semple

Ibid., pp. 146, 161.

Col. F.E. Younghusband, The Heart of a Continent, pp. 194-199. London, 1904.

A.R. Wallace, Geographical Distribution of Animals, Vol. I, pp. 387-389, 426-431, 436-438. London, 1876.

Ibid., 409, 424.

A. Heilprin, Geographical Distribution of Animals, pp. 105-108. London, 1894.

A.R. Wallace, Geographical Distribution of Animals, Vol. I, pp. 313, 321-322. London, 1876.

Anatole Leroy-Beaulieu, The Empire of the Tsars, Vol. I, ethnographical map. New York, 1893.

Eleventh Census of the United States, Population, Part I., maps on pp. xviii-xxiii.

L. March Phillipps, In the Desert, pp. 64-68, 77. London, 1905.

Fully treated in E.C. Semple, American History and Its Geographic Conditions, pp. 22-31. Boston, 1903.