@misc{indiciaec15f3672410c,
  title = {Flood-hazard mapping in metropolitan Chicago},
  author = {John Richard Sheaffer and Davis W. Ellis and Andrew Maute Spieker},
  year = {1970},
  doi = {10.3133/cir601c},
  url = {https://pubs.usgs.gov/publication/cir601C},
  note = {Source identifier: cir601C}
}