000 00286nam a2200109Ia 4500
082 _a575 STE/B
100 _aStebbins, Ledyard G.
245 4 _aThe Basis of Progressive Evolution
260 _bThe University Of Onorth Carolina Press
_aChapel Hill
_c1969
650 _aEvolution
942 _cBK
999 _c665
_d665