1. SV 40 Prep Creator: Nathans, Daniel, 1928-1999 Date: [ca. 1969] Genre: Laboratory notebooksExcerpts
2. SV 40 Prep Creator: Nathans, Daniel, 1928-1999 Date: 31 March 1969 Genre: Laboratory notebooksExcerpts
3. Letter from Ernest Winocour to Daniel Nathans Creator: Winocour, ErnestThe Weizmann Institute of Science Date: 23 July 1969 Genre: Letters (correspondence)
4. Letter from Daniel Nathans to Ernest Winocour Creator: Nathans, Daniel, 1928-1999 Date: 18 August 1969 Genre: Letters (correspondence)