@misc{indiciae4bb1408cca59,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 1986},
  url = {https://www.biodiversitylibrary.org/page/56210021},
  note = {Source identifier: page-56210021}
}