@misc{indiciae6980a9014123,
  title = {Medium Frequency Pseudo Noise Geological Radar},
  author = {G Dickey Arndt and James R Carl and Kent A Byerly and B Jon Amini},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20040015214},
  note = {Source identifier: 20040015214}
}