@misc{indiciae97299b99c429,
  title = {Quality of surface water in the coal-mining areas of western Maryland and adjacent areas of Pennsylvania and West Virginia from April 1979 to June 1980},
  author = {W. W. Staubitz},
  year = {1981},
  doi = {10.3133/ofr81812},
  url = {https://pubs.usgs.gov/publication/ofr81812},
  note = {Source identifier: ofr81812}
}