00394nam a2200121Ia 4500008004100000082001700041100001900058245004900077260003900126365000900165630004900174730004900223100415s9999    xx            000 0 und d  b9554a591.52  aBaker  R.Robin  aThe evolutionary ecology of animal migration  aLONDONc1978bHODDER AND STOUGHTON  b1505  aThe evolutionary ecology of animal migration  aThe evolutionary ecology of animal migration