1. Letter from Murrell P. Morris to Joshua Lederberg Creator: United States. Department of AgricultureMorris, Murrell P. Date: 19 May 1954 Genre: Letters (correspondence)
2. Letter from Joshua Lederberg to Murrell P. Morris Creator: Lederberg, Joshua Date: 28 April 1954 Genre: Letters (correspondence)
3. Letter from Murrell P. Morris to Joshua Lederberg Creator: United States. Department of AgricultureMorris, Murrell P. Date: 7 April 1954 Genre: Letters (correspondence)
4. Letter from Murrell P. Morris to Joshua Lederberg Creator: United States. Department of AgricultureMorris, Murrell P. Date: 7 July 1954 Genre: Letters (correspondence)