TY  - RPRT
TI  - Nitrate stable isotopes: Tools for determining nitrate sources among different land uses in the Mississippi River Basin
AU  - Cecily C.Y. Chang
AU  - C. Kendall
AU  - S. R. Silva
AU  - W.A. Battaglin
AU  - K. Campbell
PY  - 2002
DO  - 10.1139/f02-153
UR  - https://pubs.usgs.gov/publication/70023878
ID  - 70023878
ER  -