@misc{indiciae09de385ad086,
  title = {Gravimetric effects of petroleum accumulations--A preliminary summary},
  author = {Thane Hubert McCulloh},
  year = {1966},
  doi = {10.3133/cir530},
  url = {https://pubs.usgs.gov/publication/cir530},
  note = {Source identifier: cir530}
}