@misc{indiciae7e54088d9105,
  title = {Maudina and Morning Star tungsten mines, Pinal County, Arizona},
  author = {Konrad Krauskopf and Robert Stopper and P. C. Bateman and M.P. Erickson},
  year = {1944},
  doi = {10.3133/ofr4476},
  url = {https://pubs.usgs.gov/publication/ofr4476},
  note = {Source identifier: ofr4476}
}