@misc{indiciae5e69b38cb5ae,
  title = {The promise of precise borehole gravimetry in petroleum exploration and exploitation},
  author = {Thane Hubert McCulloh},
  year = {1966},
  doi = {10.3133/cir531},
  url = {https://pubs.usgs.gov/publication/cir531},
  note = {Source identifier: cir531}
}