@misc{indiciaec941b6e13e4e,
  title = {George Engelmann : botanical notebook 48 : Coniferae (Pinaceae) — Illustration, [No.] 10863},
  year = {1881},
  url = {https://www.biodiversitylibrary.org/page/55906729},
  note = {Source identifier: page-55906729}
}