@misc{indiciae17b42e6deefe,
  title = {An environmental guide to western surface mining. Part 1: Federal leasable and locatable mineral regulations},
  author = {Russell Moore},
  year = {1977},
  url = {https://pubs.usgs.gov/publication/fwsobs77\_20},
  note = {Source identifier: fwsobs77\_20}
}