Emil Bessels
![Bessels in 1880](https://upload.wikimedia.org/wikipedia/commons/1/18/Emil_Bessels_1880_%28cropped%29.jpg)
Bessels spent much of his scientific career at the Smithsonian Institution. Provided by Wikipedia
1
Published: 2016.
Superior document: Northern Lights, ; Number 19
2
Published: 1873
Superior document: Scientific results of the United States Arctic Expedition, steamer Polaris, C.F. Hall commanding Vol. I
3
Published: 1875
Superior document: Sonderdruck aus