@article {4658,
	title = {Synchronic Large-scale Disturbances and Red Spruce Growth Decline},
	journal = {Canadian Journal of Forest Research},
	volume = {23},
	year = {1993},
	pages = {1361-1374},
	keywords = {Air pollution, Red spruce, Trees -- Growth decline},
	author = {Reams, Gregory A and Van Deusen, Paul C.}
}
@article {5612,
	title = {Analyses of Great Smoky Mountain Red Spruce Tree Ring Data},
	year = {1988},
	publisher = {U. S. Department of Agriculture, Forest Service, Southern Forest Experiment Station},
	address = {New Orleans, La.},
	keywords = {Red spruce, Spruce-Fir forests, Vegetation monitoring},
	issn = {General Technical Report SO 69},
	url = {http://hdl.handle.net/2027/umn.31951d02987042l},
	author = {Van Deusen, Paul C.}
}
@article {4237,
	title = {Analyses of Great Smoky Mountain Red Spruce Tree Ring Data},
	year = {1988},
	institution = {U.S. Department of Agriculture, Forest Service},
	address = {New Orleans, LA},
	keywords = {Ecosystem, Red spruce, Trees -- Growth},
	issn = {SO-69},
	url = {http://www.srs.fs.usda.gov/pubs/gtr/gtr_so069.pdf},
	author = {Van Deusen, Paul C.}
}
@article {4681,
	title = {Red Spruce Tree Ring Analysis Using a Kalman Filter},
	year = {1988},
	pages = {57-67},
	institution = {U.S. Department of Agriculture, Forest Service},
	address = {New Orleans, LA},
	keywords = {Climate, Red spruce, Trees -- Growth},
	issn = {SO-69},
	url = {http://www.srs.fs.usda.gov/pubs/gtr/gtr_so069.pdf},
	author = {Van Deusen, Paul C.}
}
