@misc{indiciae482818a27da8,
  title = {USSR oil and gas map; geologic evaluation of potential for exploration and development},
  author = {John D. Grace},
  year = {1986},
  doi = {10.3133/ofr85746},
  url = {https://pubs.usgs.gov/publication/ofr85746},
  note = {Source identifier: ofr85746}
}