Sealy, S. G. 1975a. Feeding ecology of the ancient and marbled murrelets near Langara Island, British Columbia. Can. J. Zool. 53:418-433.
Sealy, S. G. 1975b. Aspects of the breeding biology of the marbled murrelet in British Columbia. Bird-Banding 46:141-154.
Sealy, S. G. 1975c. Influence of snow on egg-laying in auklets. Auk 92:528-538.
Smith, C. R. 1973. Time budget of the loggerhead shrike in southwest Florida. Abstracts of papers presented to the Wilson Society meeting, Cornell University.
Smith, N. G. 1966. Evolution of some arctic gulls (Larus): an experimental study of isolating mechanisms. Am. Ornithol. Union Monogr. 4. 99 pp.
Snow, B. K. 1960. The breeding biology of the shag Phalacrocorax aristotelis on the Island of Lundy, Bristol Channel. Ibis 102:554-575.
Snow, B. K. 1963. The behaviour of the shag. Br. Birds 56:77-103; 164-186.
Southern, W. E. 1967. Dispersal and migration of ring-billed gulls from a Michigan population. Jack-Pine Warbler 45:102-111.
Spaans, A. L. 1971. On the feeding ecology of the herring gull Larus argentatus Pont. in the northern part of the Netherlands. Ardea 59:73-189.
Speich, S., and D. A. Manuwal. 1974. Gular pouch development and population structure of Cassin's auklet. Auk 91:291-306.