1. Augmenting wild populations;Barclay,1987
2. Life histories of North American birds of prey;Bent;U.S. Natl. Mus. Bull. 170, Washington, D.C. USA,1938
3. Three bald eagle nests on a Minnesota transmission line;Bohm;J. Raptor Res.,1988
4. Artificial nesting structures for bald eagles, ospreys and American kestrels;Gieck,1991
5. Ferruginous hawk populations and habitat use in North Dakota;Gilmer;J. Wildl. Manage.,1983