@misc{indiciae518d8f8ac9fa,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2047},
  url = {https://www.biodiversitylibrary.org/page/56136776},
  note = {Source identifier: page-56136776}
}