@misc{indiciaefc677c6a7d54,
  title = {George Engelmann : botanical notebook 39 : Yucca (Agavaceae) — Illustration, [No.] 8556},
  year = {1873},
  url = {https://www.biodiversitylibrary.org/page/56074664},
  note = {Source identifier: page-56074664}
}