1. Oiled seabirds successfully cleaning their plumage;Birkhead;Brit. Birds,1973
2. A photographic index for aging mallard embryos;Caldwell;J. Wildl. Manage.,1974
3. The herring gull-cormorant control project;Gross;Proc. Int. Ornith. Congr.,1950
4. Criteria of age of incubated mallard, wood duck, and bob-white quail eggs;Hanson;Auk,1954
5. Some effects of oiling on reproduction of ducks;Hartung;J. Wildl. Manage.,1965