@misc{indiciae0fda6d8c4e7c,
  title = {Slope map of the Pinnacle Mountain quadrangle, Arkansas},
  author = {U.S. Geological Survey},
  year = {1978},
  doi = {10.3133/70210555},
  url = {https://pubs.usgs.gov/publication/70210555},
  note = {Source identifier: 70210555}
}