@misc{indiciae380792d87c52,
  title = {Geologic Map of the Boxley Quadrangle, Newton and Madison Counties, Arkansas},
  author = {Mark R. Hudson and Kenzie J. Turner},
  year = {2007},
  doi = {10.3133/sim2991},
  url = {https://pubs.usgs.gov/publication/sim2991},
  note = {Source identifier: sim2991}
}