@misc{indiciaefd3bfce6446b,
  title = {Soil relative dating of moraine and outwash-terrace sequences in the northern part of the upper Arkansas Valley, central Colorado, U.S.A.},
  author = {Alan R. Nelson and Ralph R. Shroba},
  year = {1998},
  doi = {10.2307/1552007},
  url = {https://pubs.usgs.gov/publication/70020596},
  note = {Source identifier: 70020596}
}