TY  - RPRT
TI  - Surface water qualit: Revisiting nitrate concentrations in the Des Moines River: 1945 and 1976-2001
AU  - G.F. McIsaac
AU  - R.D. Libra
PY  - 2003
DO  - 10.2134/jeq2003.2280
UR  - https://pubs.usgs.gov/publication/70024957
ID  - 70024957
ER  -