@misc{indiciaed32d700566ea,
  title = {Surface water supply of the United States, 1961-65: Part 5. Hudson Bay and upper Mississippi River basins: Volume 3. Upper Mississippi River basin below Keokuk, Iowa},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1971},
  doi = {10.3133/wsp1915},
  url = {https://pubs.usgs.gov/publication/wsp1915},
  note = {Source identifier: wsp1915}
}