@misc{indiciae3cc616548dd7,
  title = {Asphalt deposits and oil conditions in southwestern Arkansas},
  author = {Hugh D. Miser and Albert Homer Purdue},
  year = {1919},
  doi = {10.3133/b691j},
  url = {https://pubs.usgs.gov/publication/b691J},
  note = {Source identifier: b691J}
}