@misc{indiciae3b8eeaa3d5ea,
  title = {Microbial and spectral reflectance techniques to distinguish neutral and acidic drainage},
  author = {Eleanora I. Robbins},
  year = {1999},
  doi = {10.3133/fs11899},
  url = {https://pubs.usgs.gov/publication/fs11899},
  note = {Source identifier: fs11899}
}