TY  - RPRT
TI  - Occurrence of nitrate and herbicides in ground water in the upper Conestoga River basin, Pennsylvania : water-quality study of the Conestoga River headwaters, Pennsylvania
AU  - David K. Fishel
AU  - Patricia L. Lietman
PY  - 1986
DO  - 10.3133/wri854202
UR  - https://pubs.usgs.gov/publication/wri854202
ID  - wri854202
ER  -