@misc{indiciaeb877ba56f5a5,
  title = {Stratigraphy and geologic history of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming},
  author = {William Jasper Sando and Mackenzie Gordon and J. Thomas Dutro},
  year = {1975},
  doi = {10.3133/pp848a},
  url = {https://pubs.usgs.gov/publication/pp848A},
  note = {Source identifier: pp848A}
}