1. Excerpt from Fred Soper's diary Creator: Soper, Fred Lowe, 1893-1977 Date: [21-24 January 1939] Genre: DiariesExcerpts
2. Letter from Fred L. Soper to Wilbur A. Sawyer Creator: Soper, Fred Lowe, 1893-1977 Date: 7 July 1939 Genre: Letters (correspondence)
3. Letter from Fred L. Soper to Wilbur A. Sawyer Creator: Soper, Fred Lowe, 1893-1977 Date: 23 November 1938 Genre: Letters (correspondence)