@misc{indiciae223a74c946d7,
  title = {Correspondence : Gray (Asa) and Engelmann (George), 1841-1883 — Illustration, 1882 2 / Dec 18},
  year = {1882},
  url = {https://www.biodiversitylibrary.org/page/42653183},
  note = {Source identifier: page-42653183}
}