@misc{indiciae898f68510b78,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1789 [1] verso},
  url = {https://www.biodiversitylibrary.org/page/56143152},
  note = {Source identifier: page-56143152}
}