@misc{indiciae6d8a3e3d7870,
  title = {Computer program designed to draw bar graphs from oil shale, Fischer assay or saline mineral data},
  author = {George VanTrump and Janet K. Pitman},
  year = {1975},
  doi = {10.3133/ofr75341},
  url = {https://pubs.usgs.gov/publication/ofr75341},
  note = {Source identifier: ofr75341}
}