TY  - RPRT
TI  - Trends in selected water-quality characteristics, Powder River and tributaries, Montana and Wyoming, water years 1968-88 and 1975-88
AU  - L. E. Cary
PY  - 1991
DO  - 10.3133/wri914029
UR  - https://pubs.usgs.gov/publication/wri914029
ID  - wri914029
ER  -