@misc{indiciaedf38d3020680,
  title = {Mineral deposit densities for estimating mineral resources},
  author = {Donald A. Singer},
  year = {2007},
  doi = {10.1007/s11004-007-9127-3},
  url = {https://pubs.usgs.gov/publication/70197201},
  note = {Source identifier: 70197201}
}