@misc{indiciaed93078847eaf,
  title = {Geology of the Volga-Ural petroleum province and detailed description of the Ramashkino and Arlan oil fields},
  author = {James A. Peterson and James W. Clarke},
  year = {1983},
  doi = {10.3133/ofr83711},
  url = {https://pubs.usgs.gov/publication/ofr83711},
  note = {Source identifier: ofr83711}
}