@misc{indiciaebdf01b433a32,
  title = {Hydrologic data for a study of pre-Illinoian glacial till in Linn County, Iowa, water year 1991},
  author = {P.R. Bowman},
  year = {1992},
  doi = {10.3133/ofr92500},
  url = {https://pubs.usgs.gov/publication/ofr92500},
  note = {Source identifier: ofr92500}
}