@misc{indiciae7c669d6fc5d2,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 1984},
  url = {https://www.biodiversitylibrary.org/page/56210027},
  note = {Source identifier: page-56210027}
}