@misc{indiciae2ce7af3d71ff,
  title = {Preliminary grade and volume model of alluvial Sn-Au placers},
  author = {J. D. Bliss and W. D. Menzie},
  year = {1995},
  doi = {10.3133/ofr95649},
  url = {https://pubs.usgs.gov/publication/ofr95649},
  note = {Source identifier: ofr95649}
}