@misc{indiciaed5fde7cd9350,
  title = {Hydrologic data for the Big Spring basin, Clayton County, Iowa; water year 1989},
  author = {S. J. Kalkhoff and R.L. Kuzniar},
  year = {1991},
  doi = {10.3133/ofr9163},
  url = {https://pubs.usgs.gov/publication/ofr9163},
  note = {Source identifier: ofr9163}
}