@misc{indiciae3d8343739771,
  title = {The graphic cell method: a new look at digitizing geologic maps},
  author = {J.T. Hanley},
  year = {1982},
  doi = {10.1016/0098-3004(82)90018-8},
  url = {https://pubs.usgs.gov/publication/70011542},
  note = {Source identifier: 70011542}
}