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

by Ellen Churchill Semple

Genesis, XIII, 7-8; XXI, 25-30; XXVI, 15-22.

Herbert Spencer, Principles of Sociology, Vol. I, p. 545. New York, 1887.

Thucydides, Book II, 96.

Herodotus, IV, 46.

Meredith Townsend, Asia and Europe, Chapter on Arab Courage. New York, 1904.

Wilhelm Roscher, National-Oekonomik des Ackerbaues, p. 44. Stuttgart, 1888.

J.L. Burckhardt, Notes on the Bedouins and Wahabys, Vol. I, pp. 35-36. London, 1831.

John de Plano Carpini, Journey to the Northeast, pp. 114-117, 120-125. Hakluyt Society, London, 1904.

Ratzel, History of Mankind, Vol. I, p. 28. London, 1896-1898.

J.H. Speke, Discovery of the Source of the Nile, pp. 241-244. New York, 1868.