P. G. R. Jodice, R. B. Lanctot, V. A. Gill, D. D. Roby, S. A. Hatch, Sexing Adult Black-Legged Kittiwakes by DNA, Behavior, and Morphology, Waterbirds: The International Journal of Waterbird Biology, Vol. 23, No. 3 (2000), pp. 405-415
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