@misc{indiciaeb5900d41f851,
  title = {Texas Instruments Model 59 hand-calculator program to calculate theoretical MT planewave soundings over a structure of up to 10 horizontal layers},
  author = {David L. Campbell},
  year = {1979},
  doi = {10.3133/ofr791613},
  url = {https://pubs.usgs.gov/publication/ofr791613},
  note = {Source identifier: ofr791613}
}