@misc{indiciaeb13e12f6bbfb,
  title = {Modifications to the modular three-dimensional finite-difference ground-water flow model used for the Columbia Plateau Regional Aquifer-System Analysis, Washington, Oregon, and Idaho},
  author = {A. J. Hansen},
  year = {1993},
  doi = {10.3133/ofr91532},
  url = {https://pubs.usgs.gov/publication/ofr91532},
  note = {Source identifier: ofr91532}
}