@article {4667,
	title = {Trace Elements in Tree Rings: Evidence of Recent and Historical Air Pollution},
	journal = {Science},
	volume = {224},
	year = {1984},
	month = {May},
	pages = {494-497},
	keywords = {Air particles -- Deposition -- Heavy metals, Flora, Pollution, Trees, Trees -- Growth},
	author = {Baes, Charles F and McLaughlin, Samuel B}
}
