@misc{indiciae9a4dac2c5bc6,
  title = {Graphs of ground-water levels in Minnesota, 1962-1966},
  author = {W. A. Miller and G.C. Straka},
  year = {1969},
  doi = {10.3133/70175752},
  url = {https://pubs.usgs.gov/publication/70175752},
  note = {Source identifier: 70175752}
}