@misc{indiciaefcbc1ce4c1d5,
  title = {George Engelmann : botanical notebook 47 : Coniferae (Pinaceae) — Illustration, [No.] 10717},
  year = {1863},
  url = {https://www.biodiversitylibrary.org/page/55907804},
  note = {Source identifier: page-55907804}
}