@misc{indiciae081f34e49e68,
  title = {Geologic map of the Western Grove quadrangle, northwestern Arkansas},
  author = {Mark R. Hudson and Kenzie J. Turner and John E. Repetski},
  year = {2006},
  doi = {10.3133/sim2921},
  url = {https://pubs.usgs.gov/publication/sim2921},
  note = {Source identifier: sim2921}
}