@misc{indiciae6dca9d1e19cd,
  title = {Helicopter Electromagnetic and Magnetic Geophysical Survey Data, Oakland, Ashland, and Firth Study Areas, Eastern Nebraska, March 2007},
  author = {Bruce D. Smith and Jared D. Abraham and James C. Cannia and Gregory V. Steele and Patricia L. Hill},
  year = {2008},
  doi = {10.3133/ofr20081018},
  url = {https://pubs.usgs.gov/publication/ofr20081018},
  note = {Source identifier: ofr20081018}
}