- Islandora Repository
- Text Collection
- Thomas Hunt Morgan papers, ca. 1919-1947
- Thomas Hunt Morgan to Otto L. Mohr, 1923 January 18
- Thomas Hunt Morgan to Otto L. Mohr, 1923 March 1
- Thomas Hunt Morgan to Otto L. Mohr, 1923 November 5
- Thomas Hunt Morgan to Otto L. Mohr, 1924 September 19
- Thomas Hunt Morgan to Otto L. Mohr, 1934
- Thomas Hunt Morgan to Otto L. Mohr, 1934 March 26
- Thomas Hunt Morgan to Otto L. Mohr, 1938 December 31
- Thomas Hunt Morgan to Otto L. Mohr, 1945 July 14
- Thomas Hunt Morgan to Otto L. Mohr, 1945 June 21
- Thomas Hunt Morgan to Otto Mohr, 1920 August 22
