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

by Ellen Churchill Semple

For economic principle, see W. Roscher, Handel und Gewerbefleiss, pp. 141-147. Stuttgart, 1899.

Genesis, Chap. XXXVII, 25-28, 36.

W. Roscher, National-Oekonomik des Ackerbaues, p. 39, Note 11. Stuttgart, 1888.

S.P. Scott, History of the Moorish Empire in Europe, Vol. III, p. 616. Philadelphia, 1904.

Felix Dubois, Timbuctoo, pp. 251-252. New York, 1896.

Ibid., pp. 257-264.

S.M. Zwemer, Arabia the Cradle of Islam, p. 151. New York, 1900.

George Adam Smith, Historical Geography of the Holy Land, pp. 182-184. New York, 1897.

J.L. Burckhardt, Notes on the Bedouins and Wahabys, Vol. I, p. 65. London, 1831.

L. March Phillipps, In the Desert, pp. 130-134. London, 1903.