@misc{indiciae1b4387790782,
  title = {Geologic map of the St. Joe quadrangle, Searcy and Marion Counties, Arkansas},
  author = {Mark R. Hudson and Kenzie J. Turner},
  year = {2009},
  doi = {10.3133/sim3074},
  url = {https://pubs.usgs.gov/publication/sim3074},
  note = {Source identifier: sim3074}
}