TY  - RPRT
TI  - Water-quality assessment of the Potomac River Basin: Analysis of available pesticide data, 1972-1990
AU  - Humbert Zappia
AU  - Gary T. Fisher
PY  - 1997
DO  - 10.3133/wri974051
UR  - https://pubs.usgs.gov/publication/wri974051
ID  - wri974051
ER  -