@misc{indiciaed6bc3378676a,
  title = {Aeromagnetic map of southeastern Nebraska and parts of adjacent states},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1973},
  doi = {10.3133/ofr73297},
  url = {https://pubs.usgs.gov/publication/ofr73297},
  note = {Source identifier: ofr73297}
}