TY  - RPRT
TI  - Quality of rivers of the United States, 1975 water year; based on the National Stream Quality Accounting Network (NASQAN)
AU  - John C. Briggs
AU  - John F. Ficke
PY  - 1977
DO  - 10.3133/ofr78200
UR  - https://pubs.usgs.gov/publication/ofr78200
ID  - ofr78200
ER  -