TY  - RPRT
TI  - Use of classes based on redox and groundwater age to characterize the susceptibility of principal aquifers to changes in nitrate concentrations, 1991 to 2010
AU  - P.B. McMahon
PY  - 2012
DO  - 10.3133/sir20125220
UR  - https://pubs.usgs.gov/publication/sir20125220
ID  - sir20125220
ER  -