@misc{indiciaefb6aaadeb13e,
  title = {George Engelmann : botanical notebook 48 : Coniferae (Pinaceae) — Illustration, [No.] 10890},
  year = {1881},
  url = {https://www.biodiversitylibrary.org/page/55910619},
  note = {Source identifier: page-55910619}
}