@misc{indiciaefe0ff6d05544,
  title = {George Engelmann : botanical notebook 39 : Yucca (Agavaceae) — Illustration, [No.] 8787},
  year = {1872},
  url = {https://www.biodiversitylibrary.org/page/56096479},
  note = {Source identifier: page-56096479}
}