@misc{indiciaefff5a50aeea2,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1566},
  url = {https://www.biodiversitylibrary.org/page/54368635},
  note = {Source identifier: page-54368635}
}