TY  - RPRT
TI  - National Water-Quality Assessment program : the Willamette basin, Oregon
AU  - Dennis A. Wentz
AU  - Stuart W. McKenzie
PY  - 1991
DO  - 10.3133/ofr91167
UR  - https://pubs.usgs.gov/publication/ofr91167
ID  - ofr91167
ER  -