00840nam2-22002171i-450-99000225706040332120031022153659.0000225706FED01000225706(Aleph)000225706FED0100022570620030910d--------km-y0itay50------baOn the tendency of species to form varieties and on the perpetuation of varieties and species by natural means of selection.Englewood Cliffs, 1955, p. 282-295.001000220431Darwin,Charles<1809-1882>46083ITUNINARICAUNIMARCBK990002257060403321FFABCOn the tendency of species to form varieties and on the perpetuation of varieties and species by natural means of selection.Englewood Cliffs, 1955, p. 282-295399475UNINA