@misc{indiciaea0401da1ca1a,
  title = {GPRMODEL one-dimensional full waveform forward modeling of ground penetrating radar data},
  author = {Michael H. Powers and S.K. Duke and A. C. Huffman and G.R. Olhoeft},
  year = {1992},
  doi = {10.3133/ofr92532b},
  url = {https://pubs.usgs.gov/publication/ofr92532B},
  note = {Source identifier: ofr92532B}
}