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plate 77 image (all birds except the 4 grey/black-backed ones at lower left are "m. flava")* voelker, gary (2002): systematics and historical biogeography of wagtails: dispersal versus vicariance revisited.
plate 77 image (all birds except the 4 grey/black-backed ones at lower left are m. flava)*voelker, gary (2002): "systematics and historical biogeography of wagtails: dispersal versus vicariance revisited".
