@misc{indiciaec50979fb684d,
  title = {Interactive Macintosh display of petroleum exploration through time across the continental United States},
  author = {D.K. Higley and K. I. Takahashi and R. F. Mast},
  year = {1990},
  doi = {10.3133/ofr90676},
  url = {https://pubs.usgs.gov/publication/ofr90676},
  note = {Source identifier: ofr90676}
}