@misc{indiciaeb878a7f67c8b,
  title = {Effects of metal-mine drainage on water quality in selected areas of Colorado, 1972-73},
  author = {Robert E. Moran and Dennis A. Wentz},
  year = {1974},
  url = {https://pubs.usgs.gov/publication/70202667},
  note = {Source identifier: 70202667}
}