@article {4984,
	title = {Radial trends in cation ratios in tree rings as indicators of the impact of atmospheric deposition on forests},
	journal = {Canadian Journal of Forest Research},
	volume = {19},
	year = {1989},
	note = {Tables},
	pages = {556-594},
	publisher = {NRC Research Press},
	address = {Ottawa, Ontario, Canada},
	keywords = {Climate, Hemlocks, Red spruce, Soils},
	author = {Bondietti, E A and Baes, Charles F and McLaughlin, Samuel B}
}
