@misc{indiciaee627c04e4282,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2124},
  url = {https://www.biodiversitylibrary.org/page/56138284},
  note = {Source identifier: page-56138284}
}