@misc{indiciaeb13158808b59,
  title = {Age of emplacement of Riley County, Kansas, kimberlites and a possible minimum age for the Dakota Sandstone},
  author = {Douglas G. Brookins and Charles W. Naeser},
  year = {1971},
  doi = {10.1130/0016-7606(1971)82[1723:aoeorc]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70227439},
  note = {Source identifier: 70227439}
}