@article {4678,
	title = {A Tree Ring Analysis of Red Spruce in the Southern Appalachian Mountains},
	year = {1988},
	pages = {6-20},
	institution = {U.S. Department of Agriculture, Forest Service},
	address = {New Orleans, LA},
	keywords = {Red spruce, Trees -- Growth decline},
	issn = {SO-69},
	url = {http://www.srs.fs.usda.gov/pubs/gtr/gtr_so069.pdf},
	author = {Cook, Edward R}
}
