@misc{indiciaeea3a1c415e04,
  title = {Geohydrology and simulation of steady-state flow conditions in regional aquifer systems in Cretaceous and older rocks underlying Kansas, Nebraska, and parts of Arkansas, Colorado, Missouri, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming},
  author = {D. C. Signor and J. O. Helgesen and D. G. Jorgensen and R. B. Leonard},
  year = {1997},
  doi = {10.3133/pp1414c},
  url = {https://pubs.usgs.gov/publication/pp1414C},
  note = {Source identifier: pp1414C}
}