@misc{indiciaebbce4a6c07ef,
  title = {Manual of conchology, structural and systematic : with illustrations of the species. Second series, Pulmonata — Illustration, Plate 42},
  year = {1911},
  url = {https://www.biodiversitylibrary.org/page/1100521},
  note = {Source identifier: page-1100521}
}