U.S. Forest Service Gen. Tech. Alexander, S.A., R.S. Ferguson, and K.J. McCormick. Key migratory bird terrestrial habitat sites in the Northwest Territories. Canadian Wildlife Service Occasional Papers 71. H.A. Knight, and R.A. Birdsey.
Recent area changes in southern forest ownerships and cover types.
U.S. Forest Service, Southern Forest Experiment Station Res. Allen, A.W. 1993a. Wildlife habitat criteria in relation to future use of Conservation Reserve Program lands. Pages 41-88 in Proceedings of the Great Plains Agricultural Council Annual Meeting. Allen, A.W. 1993b.