@misc{indiciaeb94f1984864e,
  title = {The Red Bird section of the Upper Cretaceous Pierre Shale in Wyoming},
  author = {J. R. Gill and W. A. Cobban and P. M. Kier},
  year = {1966},
  doi = {10.3133/pp393a},
  url = {https://pubs.usgs.gov/publication/pp393A},
  note = {Source identifier: pp393A}
}