@misc{indiciaee86941c18326,
  title = {Ground-water resources of the lower Niobrara River and Ponca Creek basins, Nebraska and South Dakota},
  author = {Thomas G. Newport and Robert A. Krieger},
  year = {1959},
  doi = {10.3133/wsp1460g},
  url = {https://pubs.usgs.gov/publication/wsp1460G},
  note = {Source identifier: wsp1460G}
}