@misc{indiciae8dc22529c11d,
  title = {Areas of historical oil and gas exploration and production in the conterminous United States},
  author = {R. F. Mast and D. H. Root and L. P. Williams and W. R. Beeman and D.L. Barnett},
  year = {1998},
  doi = {10.3133/i2582},
  url = {https://pubs.usgs.gov/publication/i2582},
  note = {Source identifier: i2582}
}