@misc{indiciaec16be24bc1b7,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2018},
  url = {https://www.biodiversitylibrary.org/page/56134371},
  note = {Source identifier: page-56134371}
}