@misc{indiciae0b26a0128916,
  title = {40Ar/39Ar age of the Manson, Iowa, impact structure and coeval impact ejecta in the Crow Creek member of the Pierre Shale, South Dakota and Nebraska},
  author = {G. A. Izett and W. A. Cobban and G. B. Dalrymple and J. D. Obradovich},
  year = {1997},
  doi = {10.3133/ofr97523},
  url = {https://pubs.usgs.gov/publication/ofr97523},
  note = {Source identifier: ofr97523}
}