TY  - RPRT
TI  - Application of classification-tree methods to identify nitrate sources in ground water
AU  - T.B. Spruill
AU  - W.J. Showers
AU  - S. S. Howe
PY  - 2002
UR  - https://pubs.usgs.gov/publication/70024306
ID  - 70024306
ER  -