@misc{indiciae9ec8caaabe55,
  title = {George Engelmann : botanical notebook 48 : Coniferae (Pinaceae) — Illustration, [No.] 10867},
  year = {1881},
  url = {https://www.biodiversitylibrary.org/page/55906737},
  note = {Source identifier: page-55906737}
}