1. Letter from Ernest Winocour and Maxine Singer to Daniel Nathans Creator: Singer, MaxineWinocour, ErnestThe Weizmann Institute of Science Date: 4 July 1972 Genre: Letters (correspondence)
2. Letter from Ernest Winocour to Daniel Nathans Creator: Winocour, ErnestThe Weizmann Institute of Science Date: 4 November 1971 Genre: Letters (correspondence)