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Roberson, D., and C. Tenney, eds. 1993. The Atlas of the Breeding Birds of Monterey County, California. Monterey Pen. Audubon Soc., Carmel, CA.

Snow, B. K., and D.W. Snow. 1968. Breeding behavior of the Swallow-tailed Gull of the Galapagos. Condor 70:252-264.

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