- Islandora Repository
- Mss.B.B61_K
- Kirchhoff, Paul: From Boas. 1930 Sept. 27
- Kirchhoff, Paul: From Boas. 1932 May 12
- Kirchhoff, Paul: From Boas. 1932 May 19
- Kirchhoff, Paul: From Boas. 1935 Sept. 9
- Kirchhoff, Paul: From Boas. 1937 July 12
- Kirchhoff, Paul: From Boas. 1937 July 8
- Kirchhoff, Paul: To Boas. 1929 Feb. 7
- Kirchhoff, Paul: To Boas. 1929 Jan. 3
- Kirchhoff, Paul: To Boas. 1930 June 27
- Kirchhoff, Paul: To Boas. 1930 Sept. 17
- Kirchhoff, Paul: To Boas. 1931 Aug. 12
- Kirchhoff, Paul: To Boas. 1932 Aug. 18
