@misc{indiciaef0f889695147,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 1985 2},
  url = {https://www.biodiversitylibrary.org/page/56210023},
  note = {Source identifier: page-56210023}
}