- Islandora Repository
- Mss.B.B61_K
- Keppel, Frederick P.: From Boas. 1925 Jan. 13
- Keppel, Frederick P.: From Boas. 1926 Nov. 19
- Keppel, Frederick P.: From Boas. 1928 Apr. 23
- Keppel, Frederick P.: From Boas. 1928 May 18
- Keppel, Frederick P.: From Boas. 1928 Nov. 1
- Keppel, Frederick P.: From Boas. 1928 Oct. 2
- Keppel, Frederick P.: From Boas. 1929 Dec. 5
- Keppel, Frederick P.: From Boas. 1929 May 17
- Keppel, Frederick P.: From Boas. 1930 Jan. 6
- Keppel, Frederick P.: From Boas. 1930 June 12
- Keppel, Frederick P.: From Boas. 1930 Mar. 4
- Keppel, Frederick P.: From Boas. 1930 May 22
