@misc{indiciae1bd428a29dcf,
  title = {Zircon from a bentonite bed in Martinsburg shale (Ordovician) at Fisher's Hill, Virginia},
  author = {Dorothy Carroll},
  year = {1959},
  doi = {10.1130/0016-7606(1959)70[223:zpabbi]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70211662},
  note = {Source identifier: 70211662}
}