@misc{indiciaef80c8d902c07,
  title = {Documentation of computer program VS2D to solve the equations of fluid flow in variably saturated porous media},
  author = {E.G. Lappala and R. W. Healy and E.P. Weeks},
  year = {1987},
  doi = {10.3133/wri834099},
  url = {https://pubs.usgs.gov/publication/wri834099},
  note = {Source identifier: wri834099}
}