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Columbidae Columbia Pictures Columbia Records Columba (genus) Columbio Columbo Columbine (album) Columbia University Press Columbus, Ohio ColumbiformesRujukan
WikiPedia: Columbiformes http://www.nmnh.si.edu/BIRDNET/ORDERS/Columbiforme... http://elibrary.unm.edu/sora/Auk/v083n01/p0126-p01... http://dmoz.org/Science/Biology/Flora_and_Fauna/An... https://commons.wikimedia.org/wiki/Category:Columb...