3Daniel T C, Boster R S. Measuring landscape esthetics: The scenic beauty estimation method [Z]. USDA Forest Service Research Paper. RM-167, 66p. Rocky Mouncain Forest and Range Experiment Station, Fort Collins, Colo. , 1976
4Buhyoff G J, Wellman J D. Landscape preference metrics, An international comparison[J]. Journal of Environmental Management, 1983,16 : 181-190.
5Buhyoff G J. Predicting scenic quality for urban forests using vegetation measurements [J]. Forest Science, 1984,30 ( 1 ) : 71- 82.
6Jackson R H,Hudman L E,England J L. Assessment of the environmental impact of high voltage power transmission lines[J]. Journal of Environment Management, 1978,6 : 153-170.
7Vodak M C, Roberts P L, Wellman J D, et al. Scenic impacts of eastern hardwood management[J]. Forest Science, 1985, 31(2) :289-301.
