@misc{indiciae5be28850fcf9,
  title = {Preliminary bedrock geology of parts of the Burlington, Headsville, Old Fields, Romney, and Springfield quadrangles, Grant, Hampshire, Hardy, and Mineral Counties, West Virginia},
  author = {Ronald A. Parker and Todd D. Heibel},
  year = {1993},
  doi = {10.3133/ofr939},
  url = {https://pubs.usgs.gov/publication/ofr939},
  note = {Source identifier: ofr939}
}