@misc{indiciae0c0f37c122bc,
  title = {A TI-59 calculator program for computation of Schlumberger resistivity sounding curves for models with as many as 25 horizontal layers},
  author = {Ahmed Samir M. El Kahwagy},
  year = {1981},
  doi = {10.3133/ofr81160},
  url = {https://pubs.usgs.gov/publication/ofr81160},
  note = {Source identifier: ofr81160}
}