TY  - RPRT
TI  - Regional patterns in the isotopic composition of natural and anthropogenic nitrate in groundwater, High Plains, U.S.A.
AU  - P.B. McMahon
AU  - J.K. Böhlke
PY  - 2006
DO  - 10.1021/es052229q
UR  - https://pubs.usgs.gov/publication/70030472
ID  - 70030472
ER  -