@misc{indiciae247873bcefbf,
  title = {Zinc in the United States},
  author = {E.T. McKnight and W.L. Newman and A. V. Heyl},
  year = {1961},
  doi = {10.3133/ofr6195},
  url = {https://pubs.usgs.gov/publication/ofr6195},
  note = {Source identifier: ofr6195}
}