Men of the Old Stone Age: Their Environment, Life and Art

by Henry Fairfield Osborn

(22) Schwalbe, 1914.1, p. 603.

(23) Osborn, 1910.1, pp. 404-409.

(24) Ewart, 1904.1; 1907.1; 1909.1.

(25) Obermaier, 1912.1, p. 120.

(26) de Mortillet, 1869.1.

(27) Obermaier, op. cit., p. 116.

(28) Lyell, 1863.1, p. 164.

(29) Geikie, 1914.1, pp. 119, 263, 264.

(30) Schmidt, 1912.1, pp. 125, 126.

(31) Geikie, op. cit., p. 228.