@misc{indiciae183a5b45fa63,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1718},
  year = {1880},
  url = {https://www.biodiversitylibrary.org/page/56143164},
  note = {Source identifier: page-56143164}
}