@misc{indiciae24a0f7b2fac5,
  title = {Spirit leveling in Kansas, 1896-1935},
  author = {John George Staack},
  year = {1938},
  doi = {10.3133/b889},
  url = {https://pubs.usgs.gov/publication/b889},
  note = {Source identifier: b889}
}