@misc{indiciaec0f42f03e6c9,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1738},
  url = {https://www.biodiversitylibrary.org/page/56198971},
  note = {Source identifier: page-56198971}
}