@misc{indiciae56e2bcff4d11,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2146 1},
  url = {https://www.biodiversitylibrary.org/page/56150099},
  note = {Source identifier: page-56150099}
}