00390nam a2200145Ia 4500008004100000020001500041082001900056100002200075245003800097260004300135300000800178650001800186650001800204653002200222170901s1976    xx            000 0 und d  a0839109369  a575.0162bJ50I  aJohnson, Clifford 0aIntroduction to Natural Selection  aBaltimorebUniversity Park Pressc1976  a213  aLife sciences  aPure Sciences  aNatural selection