@misc{indiciae251241ed237d,
  title = {An algorithm for analysis of commodity reserves using assayed cores},
  author = {Raymond D. Watts and George Van Trump},
  year = {1976},
  doi = {10.3133/ofr76867},
  url = {https://pubs.usgs.gov/publication/ofr76867},
  note = {Source identifier: ofr76867}
}