@misc{indiciae5a2173a368b2,
  title = {Hydrologic data for the Big Spring basin, Clayton County, Iowa, water year 1990},
  author = {Stephen J. Kalkhoff and R.L. Kuzniar and D. Kolpin and C.A. Harvey},
  year = {1992},
  doi = {10.3133/ofr9267},
  url = {https://pubs.usgs.gov/publication/ofr9267},
  note = {Source identifier: ofr9267}
}