00309nam a2200121 a 450000500170000002000150001708200130003210000060004511000170005124500500006826000480011830000210016620251203110048.0  a0716750694  a575bLEW  d_  aLewin, Roger  aPatterns in evolutionbthe new molecular view  aNew YorkbScientific American Libraryc1997  avii,246p.c24cm.