Angsa berleher pendek: Perbedaan antara revisi

==Referensi==

* Carboneras, Carles (1992): ''Family Anatidae (Ducks, Geese and Swans)''. In: del Hoyo, Josep; Elliott, Andrew & Sargatal, Jordi (eds.): ''Handbook of Birds of the World'' (Volume 1: Ostrich to Ducks): 536-629, plates 40-50. Lynx Edicions, Barcelona.

 

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