@misc{indiciae4337853b3622,
  title = {Preliminary map of zinc provinces in the conterminous United States},
  author = {Edwin Wilson Tooker and Helmuth Wedow},
  year = {1980},
  doi = {10.3133/ofr79576q},
  url = {https://pubs.usgs.gov/publication/ofr79576Q},
  note = {Source identifier: ofr79576Q}
}