@misc{indiciae8b17fcfffd60,
  title = {Maps showing mineral lands classification and mineral exploration potential in the Needles 1 degree by 2 degrees Quadrangle, California and Arizona},
  author = {J. P. Calzia and R. M. Smith},
  year = {1978},
  doi = {10.3133/mf975},
  url = {https://pubs.usgs.gov/publication/mf975},
  note = {Source identifier: mf975}
}