@misc{indiciaeaa0975e2a27b,
  title = {Origin and influence of coal mine drainage on streams of the United States},
  author = {J. D. Powell},
  year = {1988},
  doi = {10.1007/bf02580450},
  url = {https://pubs.usgs.gov/publication/70013709},
  note = {Source identifier: 70013709}
}