@article{202106.0171,
	doi = {10.20944/preprints202106.0171.v1},
	url = {https://doi.org/10.20944/preprints202106.0171.v1},
	year = 2021,
	month = {June},
	publisher = {Preprints},
	author = {Amin Mohebbi and Simin Akbariyeh},
	title = {Non-Parametric Analysis of Nitrogen Trends in the form of Nitrate and Nitrite in Rivers and Streams of the Contiguous United States for 1990-2019},
	journal = {Preprints}
}