@misc{indiciae1a093092f2f0,
  title = {George Engelmann : botanical notebook 7 : Echinocactus, Echinopsis, and Cereus — Illustration, [No.] 1706},
  year = {1870},
  url = {https://www.biodiversitylibrary.org/page/56167084},
  note = {Source identifier: page-56167084}
}