@misc{indiciae1a93719a7a2d,
  title = {Schematic drawing of a USGS high voltage D.C. resistivity transmitter},
  author = {C. M. Mitchell and R. W. Krizman},
  year = {1981},
  doi = {10.3133/ofr81579},
  url = {https://pubs.usgs.gov/publication/ofr81579},
  note = {Source identifier: ofr81579}
}