@misc{indiciae23d97f77db1b,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2048},
  url = {https://www.biodiversitylibrary.org/page/56136778},
  note = {Source identifier: page-56136778}
}