@misc{indiciaec25a49fa8567,
  title = {The problem of the Cochrane in late Pleistocene chronology},
  author = {Thor N. V. Karlstrom},
  year = {1956},
  doi = {10.3133/b1021j},
  url = {https://pubs.usgs.gov/publication/b1021J},
  note = {Source identifier: b1021J}
}