@misc{indiciae56f61c5a9a1f,
  title = {A second Kevin-Sunburst map},
  author = {C. E. Erdmann and J.T. Gist and G.W. Beer and J.W. Nordquist},
  year = {1947},
  doi = {10.3133/ofr4718},
  url = {https://pubs.usgs.gov/publication/ofr4718},
  note = {Source identifier: ofr4718}
}