@article {4197,
	title = {Mapping Elemental Concentrations in Great Smoky Mountains National Park with Lichens},
	year = {1987},
	note = {Maps},
	month = {August},
	institution = {National Park Service Air Quality Division},
	keywords = {Air quality, Geology, Lichens, Mapping, Topography},
	issn = {SP-4450-87-40},
	url = {http://archive.org/details/mappingelemental00nort}
}
