@misc{indiciae66ee6acd69ed,
  title = {Description of physical environment and of strip-mining operations in parts of Beaver Creek basin, Kentucky},
  author = {J.J. Musser},
  year = {1963},
  doi = {10.3133/pp427a},
  url = {https://pubs.usgs.gov/publication/pp427A},
  note = {Source identifier: pp427A}
}