@misc{indiciaeeaf5cbae1d18,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2121},
  url = {https://www.biodiversitylibrary.org/page/56138276},
  note = {Source identifier: page-56138276}
}