@misc{indiciae245dc14869e0,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2146 2},
  url = {https://www.biodiversitylibrary.org/page/56150103},
  note = {Source identifier: page-56150103}
}