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Orientation responses of Ring-billed Gull chicks: a re-evaluation. Animal Migration, Navigation, and Homing. :311-317.. 1978.
Orientation in Gulls: effect of distance, direction of release, and wind. Living Bird. 9:75-95.. 1970.
Orientation behavior of Ring-billed Gull chicks and fledglings. The Condor. 71:418-425.. 1969.