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Cite this: Oort, Eduard Daniel van. 1922. Ornithologia neerlandica. De vogels van Nederland, door prof. dr. E. D. van Oort. d. 1 (1922), s-Gravenhage : M. Nijhoff.
Original Caption: Male in jeugdkleed. Oud male. Podiceps grisegena (Boddaert)
