@misc{indiciae461566aec531,
  title = {Soot and palynologic analysis of Manson impact-related strata (Upper Cretaceous) of Iowa and South Dakota, USA},
  author = {D.J. Varricchio and R.F. Raven and W.S. Wolbach and W.C. Elsik and B.J. Witzke},
  year = {2009},
  doi = {10.1016/j.cretres.2008.06.005},
  url = {https://pubs.usgs.gov/publication/70033009},
  note = {Source identifier: 70033009}
}