@misc{indiciaeb8e16bf32329,
  title = {Map showing geology, oil and gas fields, and geologic provinces of the Gulf of Mexico region},
  year = {2006},
  doi = {10.3133/ofr97470l},
  url = {https://pubs.usgs.gov/publication/ofr97470L},
  note = {Source identifier: ofr97470L}
}