@misc{indiciae8e27fc9ecbf6,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2128},
  url = {https://www.biodiversitylibrary.org/page/56138292},
  note = {Source identifier: page-56138292}
}