@misc{indiciae07c5e9be55e4,
  title = {Lower Turonian (Upper Cretaceous) Watinoceras devonense Zone ammonite fauna in Colorado, USA},
  author = {W. J. Kennedy and W. A. Cobban and W.P. Elder and J.I. Kirkland},
  year = {1999},
  doi = {10.1006/cres.1999.0172},
  url = {https://pubs.usgs.gov/publication/70021287},
  note = {Source identifier: 70021287}
}