@misc{indiciaeab090438f80b,
  title = {National overview of abandoned mine land sites utilizing the Minerals Availability System (MAS) and Geographic Information Systems (GIS) technology},
  author = {David A. Ferderer},
  year = {1996},
  doi = {10.3133/ofr96549},
  url = {https://pubs.usgs.gov/publication/ofr96549},
  note = {Source identifier: ofr96549}
}