@misc{indiciae3dc95dcb41d0,
  title = {Miocene marine diatoms from the Choptank Formation, Calvert County, Maryland},
  author = {George William Andrews},
  year = {1976},
  doi = {10.3133/pp910},
  url = {https://pubs.usgs.gov/publication/pp910},
  note = {Source identifier: pp910}
}