@misc{indiciae6ee70de510bf,
  title = {Subsurface structure map of the Cole Creek oil field},
  author = {R.D. Ferguson},
  year = {1945},
  doi = {10.3133/ofr4539},
  url = {https://pubs.usgs.gov/publication/ofr4539},
  note = {Source identifier: ofr4539}
}