00257nam a2200097 a 450000500170000008200200001710000230003724500380006026000390009830000220013720251203090507.0  a591.38,bD, wyn  aWynne-Edwards, VC.  aEvolution through group selection  aOxfordbBlackwell Scientificc1986  axii, 386p, 22 cm.