@misc{indiciae227ef7be5a0b,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1740 1},
  url = {https://www.biodiversitylibrary.org/page/56198967},
  note = {Source identifier: page-56198967}
}