Aerial assessment of red spruce & balsam fir condition in the Adirondack region of New York, the Green Mountains of Vermont, the White Mountains of New Hampshire, and the mountains of western Maine, 1985-1986 / Margaret Miller-Weeks & Dean Smoronk ; in cooperation with the New York Department of Environmental Conservation, Vermont Department of Forests, Parks, and Recreation, New Hampshire Department of Resources & Economic Development, Maine Forest Service, & Department of Forestry, University of Maine.