Gulls -- Behavior -- Congresses. : Ecology and behavior of gulls : proceedings of an international symposium of the Colonial Waterbird Group and the Pacific Seabird Group, San Francisco, California, 6 December, 1985 / editors, Judith Latta Hand, William E. Southern, and Kees Vermeer
Gulls -- Ecology -- Congresses. : Ecology and behavior of gulls : proceedings of an international symposium of the Colonial Waterbird Group and the Pacific Seabird Group, San Francisco, California, 6 December, 1985 / editors, Judith Latta Hand, William E. Southern, and Kees Vermeer