@misc{indiciae5a01885a6485,
  title = {Structure of the Vicksburg-Jackson area, Mississippi, with special reference to oil and gas},
  author = {O. B. Hopkins},
  year = {1917},
  doi = {10.3133/b641d},
  url = {https://pubs.usgs.gov/publication/b641D},
  note = {Source identifier: b641D}
}