@misc{indiciae1ea47d34f8f2,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1642},
  url = {https://www.biodiversitylibrary.org/page/56146403},
  note = {Source identifier: page-56146403}
}