@misc{indiciaee946aa2dbe09,
  title = {Maps showing coal resources of the Crumpler quadrangle, Mercer, McDowell, and Wyoming Counties, West Virginia},
  author = {Gary D. Stricker},
  year = {1980},
  doi = {10.3133/mf1250},
  url = {https://pubs.usgs.gov/publication/mf1250},
  note = {Source identifier: mf1250}
}