@misc{indiciae2f58a126ac73,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2006},
  url = {https://www.biodiversitylibrary.org/page/56166919},
  note = {Source identifier: page-56166919}
}