@misc{indiciae9e59480e7490,
  title = {Correspondence : Baum (Albert) and Engelmann (George), 1881 — Illustration, Oct 20 / 1881 2},
  year = {1881},
  url = {https://www.biodiversitylibrary.org/page/42237639},
  note = {Source identifier: page-42237639}
}