@book {6928,
	title = {An Appalachian Tragedy : Air Pollution and Tree Death in the Eastern Forests of North America},
	year = {1998},
	note = {Illustrations, Maps},
	publisher = {Sierra Club Books},
	organization = {Sierra Club Books},
	address = {San Francisco, CA},
	keywords = {Air pollution, Forests, Photographs, Trees -- Growth decline},
	author = {Ayers, Harvard and Hager, Jenny and Little, Charles E}
}
