TY  - RPRT
TI  - The computer program estimate trend (ESTREND), a system for the detection of trends in water-quality data
AU  - Terry L. Schertz
AU  - Richard B. Alexander
AU  - Dane J. Ohe
PY  - 1991
DO  - 10.3133/wri914040
UR  - https://pubs.usgs.gov/publication/wri914040
ID  - wri914040
ER  -