00270nam a2200097 a 450000500170000008200200001710000210003724500480005826000460010630000200015220251203091012.0  a591.56,bD, kev  aKevles, Bettyann  aFemales of the species: sex and survival...  aCambridgebHarvard University Pressc1986  ax, 270p, 22 cm.