Desmond A. & Moore, J. (1991) Darwin Penguin Books pp. 617 "Darwin was loathe to let go of the notion that a well-used and strengthened organ could be inherited" Darwin (1872) The Origin of Species, 6th Edn., pp. 421 Wiedersheim, Robert (1893).
Desmond A. e Moore, J. (1991) Darwin Penguin Books pp. 617 "Darwin era reticente a usar a noción de que un órgano ben usado e fortalecido puidese herdarse" Darwin (1872) The Origin of Species, 6th Edn., pp. 421 Wiedersheim, Robert (1893).