@misc{indiciaeb08a8e4ddd11,
  title = {Hydrologic Unit Map-1974, State of Indiana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1975},
  doi = {10.3133/hu14},
  url = {https://pubs.usgs.gov/publication/hu14},
  note = {Source identifier: hu14}
}