Charles Lyell: Citations en anglais
Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 421
Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 417-418
Source: The Geological Evidences of the Antiquity of Man (1863), Ch.20, p. 386
Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 410