@misc{indiciaee8f8067f2285,
  title = {Thickness, percent sand, and configuration of shallow hydrogeologic units in the Powder River basin, Montana and Wyoming},
  author = {B. D. Lewis and W. R. Hotchkiss},
  year = {1981},
  doi = {10.3133/i1317},
  url = {https://pubs.usgs.gov/publication/i1317},
  note = {Source identifier: i1317}
}