@misc{indiciae866114a8c5d0,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2127},
  url = {https://www.biodiversitylibrary.org/page/56138290},
  note = {Source identifier: page-56138290}
}