TY  - RPRT
TI  - Long-term changes in consentrations and flux fo nitrogen in the Mississippi River Basin, USA
AU  - D. A. Goolsby
AU  - W.A. Battaglin
PY  - 2001
DO  - 10.1002/hyp.210
UR  - https://pubs.usgs.gov/publication/70023286
ID  - 70023286
ER  -