@misc{indiciaec4447e6c3bb8,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1669},
  url = {https://www.biodiversitylibrary.org/page/56141656},
  note = {Source identifier: page-56141656}
}