@misc{indiciae9f815a8601f0,
  title = {Converting contour-line data into data sets for a multilayered aquifer using a geographic information system},
  author = {Julia A. Rees},
  year = {1999},
  doi = {10.3133/ofr9954},
  url = {https://pubs.usgs.gov/publication/ofr9954},
  note = {Source identifier: ofr9954}
}