@misc{indiciae31b8b6650095,
  title = {George Engelmann : botanical notebook 11 : Opuntia 1856-1882 — Illustration, [No.] 2568},
  year = {1869},
  url = {https://www.biodiversitylibrary.org/page/52850078},
  note = {Source identifier: page-52850078}
}