TY  - RPRT
TI  - The National Water-Quality Assessment Program; entering a new decade of investigations
AU  - R. J. Gilliom
AU  - P. A. Hamilton
AU  - T. L. Miller
PY  - 2001
DO  - 10.3133/fs07101
UR  - https://pubs.usgs.gov/publication/fs07101
ID  - fs07101
ER  -