@misc{indiciaef77404440c59,
  title = {Atlas of coal/minerals and important resource problem areas for fish and wildlife in the conterminous United States},
  author = {Robert A. Honig and Richard J. Olson and William T. Mason},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/fwsobs81\_06},
  note = {Source identifier: fwsobs81\_06}
}