@misc{indiciaefb3afc3aba21,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1654},
  url = {https://www.biodiversitylibrary.org/page/56167047},
  note = {Source identifier: page-56167047}
}