@misc{indiciaed229996a5090,
  title = {Geographic information systems},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1992},
  doi = {10.3133/70039223},
  url = {https://pubs.usgs.gov/publication/70039223},
  note = {Source identifier: 70039223}
}