@misc{indiciaec4a44eb463f7,
  title = {Solution of three-dimensional groundwater flow equations using the strongly implicit procedure},
  author = {P.C. Trescott and S. P. Larson},
  year = {1977},
  doi = {10.1016/0022-1694(77)90076-2},
  url = {https://pubs.usgs.gov/publication/70009876},
  note = {Source identifier: 70009876}
}