@misc{indiciaeb58e288deb6a,
  title = {Problematica Silurica : Systême Silurien du centre de la Bohême — Illustration, Plate 11},
  year = {1908},
  url = {https://www.biodiversitylibrary.org/page/14881018},
  note = {Source identifier: page-14881018}
}