TY  - RPRT
TI  - Estimating background and threshold nitrate concentrations using probability graphs
AU  - S.V. Panno
AU  - W.R. Kelly
AU  - A.T. Martinsek
AU  - Keith C. Hackley
PY  - 2006
DO  - 10.1111/j.1745-6584.2006.00240.x
UR  - https://pubs.usgs.gov/publication/70028392
ID  - 70028392
ER  -