004950000a2200169000450024500610000065000090006165000200007065000320009065000240012265300230014665300210016965300330019004100130022370000210023610000210025777300470027810aRecoveries of North American waterfowl in the neotropics14aAves14aPatos anillados14aDistribución geográfica14aMigraciones de aves  gAnaseAnas discors  gAnaseAnas acuta  gAnsereAnser albifronsvpato0 aInglés1 aRusch, Donald H.1 aBotero, Jorge E.1 tWaterfowl in Winter370h35q469-482d1988