@misc{indiciaea77930321b32,
  title = {Correspondence : Gray (Asa) and Engelmann (George), 1841-1883 — Illustration, 1856 2 / Apr 14},
  year = {1856},
  url = {https://www.biodiversitylibrary.org/page/42635708},
  note = {Source identifier: page-42635708}
}