00275nam a2200097Ia 4500008004100000082002200041100002200063245002200085260006200107300000800169140113s9999    xx            000 0 und d  a577.9+576.12   L5  a"Williams, G.C. "  aSex and evolution  a1975bPrinceton University Pressc"Princeton, New Jersey"  a200