@misc{indiciae459f474e9f7f,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2080},
  url = {https://www.biodiversitylibrary.org/page/56139919},
  note = {Source identifier: page-56139919}
}