@misc{indiciaeb5ab7983c4e6,
  title = {George Engelmann : botanical notebook 11 : Opuntia 1856-1882 — Illustration, [No.] 2567},
  year = {1869},
  url = {https://www.biodiversitylibrary.org/page/52850076},
  note = {Source identifier: page-52850076}
}