00501nam a2200157Ia 4500008004100000082001700041100001600058245003100074260003200105365000600137630003100143730003100174942000900205999001900214952011000233100415s9999    xx            000 0 und d  b235a598.252  aThomson  AL  aProblems of bird migration  aW.C.c1926bH.F.&G.WITHERBY  b0  aProblems of bird migration  aProblems of bird migration  cBOOK  c583314d583311  00104070aBNHSbBNHSd1994-10-18g0.00l0o598.252 235pBNHS-235r2010-04-15 00:00:00w2010-04-15yBOOK