@misc{indiciae99c700ab90ae,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2008},
  url = {https://www.biodiversitylibrary.org/page/56166923},
  note = {Source identifier: page-56166923}
}