@misc{indiciae2e09f55e8248,
  title = {Rhode Island anthracite. Coking coal in Powell Mountain, Scott County, Virginia. The coal resources and general geology of the Pound quadrangle of Virginia and Kentucky. The coal resources of a part of northeastern Missouri},
  author = {G. H. Ashley and Marius R. Campbell and Charles Butts and F. C. Greene},
  year = {1914},
  doi = {10.3133/b541f},
  url = {https://pubs.usgs.gov/publication/b541F},
  note = {Source identifier: b541F}
}