@misc{indiciaef640db8910ef,
  title = {Maps showing industrial mineral resources of the Joplin 1° x 2° quadrangle, Kansas and Missouri},
  author = {David A. Grisafe and Ardel W. Rueff},
  year = {1991},
  doi = {10.3133/mf2125b},
  url = {https://pubs.usgs.gov/publication/mf2125B},
  note = {Source identifier: mf2125B}
}