@misc{indiciaec708dd7954db,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 1992 1},
  url = {https://www.biodiversitylibrary.org/page/56134380},
  note = {Source identifier: page-56134380}
}