@misc{indiciaea5cf09a9288e,
  title = {Downflow limestone beds for treatment of net-acidic, oxic, iron-laden drainage from a flooded Anthracite Mine, Pennsylvania, USA: 1. Field evaluation},
  author = {C.A. Cravotta and S.J. Ward},
  year = {2008},
  doi = {10.1007/s10230-008-0029-5},
  url = {https://pubs.usgs.gov/publication/70033431},
  note = {Source identifier: 70033431}
}