TY  - RPRT
TI  - Organophosphorus pesticide occurrence and distribution in surface and ground water of the United States, 1992-97
AU  - Evelyn H. Hopkins
AU  - Daniel J. Hippe
AU  - Elizabeth A. Frick
AU  - Gary R. Buell
PY  - 2000
DO  - 10.3133/ofr00187
UR  - https://pubs.usgs.gov/publication/ofr00187
ID  - ofr00187
ER  -