@misc{indiciae80cc46dfa5bc,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 1995},
  url = {https://www.biodiversitylibrary.org/page/56134388},
  note = {Source identifier: page-56134388}
}