@misc{indiciae50be69c9ebc2,
  title = {Geologic and structure contour map of the Clay Basin gas field},
  author = {C. E. Dobbin and R. Davidson},
  year = {1945},
  doi = {10.3133/ofr4536},
  url = {https://pubs.usgs.gov/publication/ofr4536},
  note = {Source identifier: ofr4536}
}