@misc{indiciae2072af7ede2c,
  title = {Digital map of water-level changes in the High Plains Aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1980 to 1996},
  author = {Brian C. Fischer and Virginia L. McGuire},
  year = {1999},
  doi = {10.3133/ofr99198},
  url = {https://pubs.usgs.gov/publication/ofr99198},
  note = {Source identifier: ofr99198}
}