1. Anderson, D. W., and Gress, F., 1981, The politics of pelicans, in: Coast Alert: Scientists Speak Out ( T. C. Jackson and D. Reische, eds.), pp. 117–143, Coast Alliance/Friends of the Earth, San Francisco.
2. Anonymous, 1980, Conference on the conservation of wetlands of international importance, especially as waterfowl habitat, Cagliari, Italy, International Waterfowl Research Bureau, Slimbridge, England.
3. Ashmole, M. J., 1970, Feeding of Western and Semipalmated Sandpipers in Peruvian winter quarters, Auk 87: 131–135.
4. Atkinson-Willes, G. L., Scott, D. A., and Prater, A. J., 1980, Criteria for selecting wetlands of international importance: Proposed amendments and guidelines for use, Conference on the conservation of wetlands of international importance, especially as waterfowl habitat, Cagliari, Italy, International Waterfowl Research Bureau, Slimbridge, England.
5. Baker, M. C., and Baker, A. E. M., 1973, Niche relationships among six species of shorebirds on their wintering and breeding ranges, Ecol. Monogr. 43: 193–212.