@misc{indiciae4233052b8d16,
  title = {A mechanical panning technique for separation of fine-grained gold and other heavy minerals},
  author = {B.L. English and G. A. Desborough and W. H. Raymond},
  year = {1987},
  doi = {10.3133/ofr87364},
  url = {https://pubs.usgs.gov/publication/ofr87364},
  note = {Source identifier: ofr87364}
}