@misc{indiciae5a2f2e5e79d3,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1757},
  url = {https://www.biodiversitylibrary.org/page/56147446},
  note = {Source identifier: page-56147446}
}