Critical loads for inorganic nitrogen deposition in the Colorado Front Range,USA. Williams, M. W. & Tonnessen, K. Ecological Aplications, 2000.
bibtex   
@article{williams_critical_2000,
	title = {Critical loads for inorganic nitrogen deposition in the {Colorado} {Front} {Range},{USA}},
	volume = {10},
	number = {6},
	journal = {Ecological Aplications},
	author = {Williams, M. W. and Tonnessen, K.A.},
	year = {2000},
	keywords = {NWT, NWTLTER}
}

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