Planning for population viability on Northern Great Plains national grasslands - Samson, F.; Knopf, F.L.; McCarthy, C.W.; Noon, B.R.; Ostlie, W.R.; Rinehart, S.M.; Larson, S.; Plumb, G.; Schenbeck, G.L.; Svingen, D.N.; Byer, T.W. (Wildlife Society Bulletin, 2003)