TY  - RPRT
TI  - Effects of sampling strategies on estimates of annual mean herbicide concentrations in midwestern rivers
AU  - W.A. Battaglin
AU  - L.E. Hay
PY  - 1996
DO  - 10.1021/es950351r
UR  - https://pubs.usgs.gov/publication/70019408
ID  - 70019408
ER  -