@misc{indiciae10a71b759ae9,
  title = {George Engelmann : botanical notebook 46 : Coniferae (Pinaceae) — Illustration, [No.] 10535 2},
  year = {1869},
  url = {https://www.biodiversitylibrary.org/page/55920138},
  note = {Source identifier: page-55920138}
}