@misc{indiciae5a1c33c264e7,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1633},
  url = {https://www.biodiversitylibrary.org/page/56146385},
  note = {Source identifier: page-56146385}
}