@misc{indiciae16b075cdd0e6,
  title = {Hydraulic equivalence of grains of quartz and heavier minerals, and implications for the study of placers},
  author = {H. A. Tourtelot},
  year = {1968},
  doi = {10.3133/pp594f},
  url = {https://pubs.usgs.gov/publication/pp594F},
  note = {Source identifier: pp594F}
}