@misc{indiciae1c2383733950,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2010},
  url = {https://www.biodiversitylibrary.org/page/56134355},
  note = {Source identifier: page-56134355}
}