@misc{indiciaef7c6157ae1f7,
  title = {Map of Nebraska showing areal distribution of pre-Pennsylvanian rocks, anticlines and basins, oil and gas fields, pipelines, and unsuccessful test wells},
  author = {E.C. Reed and R.F. Svoboda and G.E. Prichard and Jeannette Fox},
  year = {1958},
  doi = {10.3133/om198},
  url = {https://pubs.usgs.gov/publication/om198},
  note = {Source identifier: om198}
}