@misc{indiciaebfa96bbc57d5,
  title = {Source code and ancillary data files for the MODPATH particles tracking package of the ground-water flow model MODFLOW},
  author = {David W. Pollock},
  year = {1994},
  doi = {10.3133/ofr94463},
  url = {https://pubs.usgs.gov/publication/ofr94463},
  note = {Source identifier: ofr94463}
}