- Islandora Repository
- Mss.B.B61_B
- Beckwith, Martha Warren: To Boas. 1917 Mar. 27
- Beckwith, Martha Warren: To Boas. 1917 May 19
- Beckwith, Martha Warren: To Boas. 1917 May 30
- Beckwith, Martha Warren: To Boas. 1918 June 1
- Beckwith, Martha Warren: To Boas. 1918 Oct. 6
- Beckwith, Martha Warren: To Boas. 1919 Dec. 1
- Beckwith, Martha Warren: To Boas. 1919 Dec. 14
- Beckwith, Martha Warren: To Boas. 1919 Dec. 18
- Beckwith, Martha Warren: To Boas. 1919 Dec. 28
- Beckwith, Martha Warren: To Boas. 1919 Nov. 17
- Beckwith, Martha Warren: To Boas. 1919 Nov. 25
- Beckwith, Martha Warren: To Boas. 1919 Nov. 4