@misc{indiciae06adc3e6664f,
  title = {George Engelmann : botanical notebook 9 : Echinocereus, Cereus, Eulychnia, Pilocereus — Illustration, [No.] 2142 1},
  url = {https://www.biodiversitylibrary.org/page/56150089},
  note = {Source identifier: page-56150089}
}