@article {4986,
	title = {Seasonal variation in nitrate reductase activity in needles of high-elevation red spruce trees},
	journal = {Canadian Journal of Forest Research},
	volume = {22},
	year = {1992},
	note = {Tables},
	pages = {375-380},
	publisher = {NRC Research Press},
	address = {Ottawa, Ontario, Canada},
	keywords = {Pollution, Red spruce, Soils, Spruce-Fir forests},
	author = {Tjoelker, Mark G and McLaughlin, Samuel B and DiCosty, R. J and Lindberg, Steven E and Norby, R. J}
}
