@misc{indiciae03f0d21e50d3,
  title = {Problematica Silurica : Systême Silurien du centre de la Bohême — Illustration, Fig. 6, Page 22},
  year = {1908},
  url = {https://www.biodiversitylibrary.org/page/14880950},
  note = {Source identifier: page-14880950}
}