@misc{indiciae57b4c3bce065,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2076},
  url = {https://www.biodiversitylibrary.org/page/56136795},
  note = {Source identifier: page-56136795}
}