@misc{indiciaecb424f801e04,
  title = {George Engelmann : botanical notebook 47 : Coniferae (Pinaceae) — Illustration, [No.] 10721},
  year = {1863},
  url = {https://www.biodiversitylibrary.org/page/55907812},
  note = {Source identifier: page-55907812}
}