@misc{indiciae54fa4ce3ea93,
  title = {George Engelmann : botanical notebook 48 : Coniferae (Pinaceae) — Illustration, [No.] 10880},
  year = {1881},
  url = {https://www.biodiversitylibrary.org/page/55910599},
  note = {Source identifier: page-55910599}
}