00445nam a22001217a 4500020002400000082001600024100002100040245012300061260002400184300002200208500002000230650007300250  a9780486450063 (pbk)  a576.82bDAR  a Darwin, Charles  aOn the origin of speciesb by means of natural selection or the presevation of favoured races in the struggle for life  aLondonbDoverc2006  axiv, 321c; 20 cm  aInclude indexes  aNatural selectionvMorphologyvHybridismvEvolutionvVariationvFSSH