@misc{indiciae27d8201a08af,
  title = {Yorkshire type ammonites : the original descriptions reprinted, and illustrated by figures of the types, reproduced from photographs mainly by J.W. Tutcher — Illustration, BHL page 31744607},
  year = {1909},
  url = {https://www.biodiversitylibrary.org/page/31744607},
  note = {Source identifier: page-31744607}
}