@misc{indiciae9f641e0a3c6b,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2082},
  url = {https://www.biodiversitylibrary.org/page/56139925},
  note = {Source identifier: page-56139925}
}