@misc{indiciae5602402e2359,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1732 [1] verso / [No.] 1732 2},
  url = {https://www.biodiversitylibrary.org/page/56198983},
  note = {Source identifier: page-56198983}
}