@misc{indiciaee8b7ffc6790a,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1779},
  url = {https://www.biodiversitylibrary.org/page/56143133},
  note = {Source identifier: page-56143133}
}