TY  - RPRT
TI  - Distribution of selected herbicides and nitrate in the Mississippi River and its major tributaries, April through June 1991
AU  - D. A. Goolsby
AU  - R.C. Coupe
AU  - D.J. Markovchick
PY  - 1991
DO  - 10.3133/wri914163
UR  - https://pubs.usgs.gov/publication/wri914163
ID  - wri914163
ER  -