@misc{indiciae8e174dab6fc5,
  title = {The computer program estimate trend (ESTREND), a system for the detection of trends in water-quality data},
  author = {Terry L. Schertz and Richard B. Alexander and Dane J. Ohe},
  year = {1991},
  doi = {10.3133/wri914040},
  url = {https://pubs.usgs.gov/publication/wri914040},
  note = {Source identifier: wri914040}
}