@misc{indiciae9427c3e14e10,
  title = {Our mineral supplies--Grinding and polishing materials},
  author = {F.J. Katz},
  year = {1919},
  doi = {10.3133/b666k},
  url = {https://pubs.usgs.gov/publication/b666K},
  note = {Source identifier: b666K}
}