@misc{indiciae0a71f96eaf3b,
  title = {Bathymetric contour maps of lakes surveyed in Iowa in 2005},
  author = {S. M. Linhart and K. D. Lund},
  year = {2008},
  doi = {10.3133/sim3037},
  url = {https://pubs.usgs.gov/publication/sim3037},
  note = {Source identifier: sim3037}
}