@misc{indiciae5a58e1e6fa0f,
  title = {Borehole gravimetry reviews},
  author = {Stephen L. Robbins},
  year = {1989},
  doi = {10.3133/cir890},
  url = {https://pubs.usgs.gov/publication/cir890},
  note = {Source identifier: cir890}
}