@misc{indiciaeef754f91f539,
  title = {Sources of salinity near a coal mine spoil pile, north-central Colorado},
  author = {R. A. Zielinski and J. K. Otton and C. A. Johnson},
  year = {2001},
  doi = {10.2134/jeq2001.3041237x},
  url = {https://pubs.usgs.gov/publication/70023255},
  note = {Source identifier: 70023255}
}