00543nam a2200217Ia 4500008004100000020001800041040000600059041001200065082000800077082001100085100001700096245004400113245001700157260001000174260002000184260000900204300005500213300001200268501002800280650001700308141004s9999    xx            000 0 und d  a0 7137 1422 0  ca  aEnglish  a598  bFRE/HO  aRon  Freethy  aHow birds work: A guide to bird biology  cRon  Freethy  aPoole  bBlandford press  c1982  a232 p.                                              b23.5 cm  aKAUCOF                   aBird biology