@misc{indiciae9f7d85a0a0f6,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2045},
  url = {https://www.biodiversitylibrary.org/page/56136772},
  note = {Source identifier: page-56136772}
}