@misc{indiciaeec295e9a23cb,
  title = {A program to simulate and aquifer using alternating direction implicit-iterative procedure},
  author = {Thomas Maddock},
  year = {1970},
  doi = {10.3133/ofr70211},
  url = {https://pubs.usgs.gov/publication/ofr70211},
  note = {Source identifier: ofr70211}
}