@misc{indiciaed61b9d8ccffe,
  title = {Documentation of AIR3D, an adaptation of the ground-water-flow code MODFLOW to simulate three-dimensional air flow in the unsaturated zone},
  author = {C.J. Joss and A. L. Baehr},
  year = {1995},
  doi = {10.3133/ofr94533},
  url = {https://pubs.usgs.gov/publication/ofr94533},
  note = {Source identifier: ofr94533}
}