@misc{indiciae2f8fe91df79e,
  title = {Models of grades and tonnages of some lode tin deposits},
  author = {W. D. Menzie and B.L. Reed and Donald A. Singer},
  year = {1988},
  doi = {10.1007/978-3-642-72765-8\_4},
  url = {https://pubs.usgs.gov/publication/70197264},
  note = {Source identifier: 70197264}
}