@misc{indiciaea6bc807fbbdd,
  title = {Bibliography with abridged abstracts of subsurface gravimetry (especially borehole) and corresponding in-situ rock density determinations},
  author = {Stephen L. Robbins},
  year = {1980},
  doi = {10.3133/ofr80710},
  url = {https://pubs.usgs.gov/publication/ofr80710},
  note = {Source identifier: ofr80710}
}