@misc{indiciaef7b1b8f8601b,
  title = {Die Süsswasserfauna Deutschlands. Eine Exkursionsfauna — Illustration, Page 56},
  year = {1909},
  url = {https://www.biodiversitylibrary.org/page/1009587},
  note = {Source identifier: page-1009587}
}