@misc{indiciae3db6c20af4de,
  title = {Instructions for using the punch-card system for the storage and retrieval of ground-water data},
  author = {S.M. Lang and A.R. Leonard},
  year = {1966},
  doi = {10.3133/ofr6595},
  url = {https://pubs.usgs.gov/publication/ofr6595},
  note = {Source identifier: ofr6595}
}