@misc{indiciaeac8d31431244,
  title = {Carboniferous foraminifera and algae of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming},
  author = {B. L. Mamet},
  year = {1975},
  doi = {10.3133/pp848b},
  url = {https://pubs.usgs.gov/publication/pp848B},
  note = {Source identifier: pp848B}
}