41. Letter from Daniel Nathans to William F. Harrington Creator: Nathans, Daniel, 1928-1999 Date: 7 August 1980 Genre: Letters (correspondence)
42. Letter from Daniel Nathans to Wallace P. Rowe Creator: Nathans, Daniel, 1928-1999 Date: 1 December 1975 Genre: Letters (correspondence)
43. Letter from Daniel Nathans to W. Barry Wood Creator: Nathans, Daniel, 1928-1999 Date: 4 February 1969 Genre: Letters (correspondence)
44. Letter from Daniel Nathans to Senator Tom Harkin Creator: Nathans, Daniel, 1928-1999 Date: 28 August 1990 Genre: Letters (correspondence)
45. Letter from Daniel Nathans to Roy D. Schmickel Creator: Nathans, Daniel, 1928-1999 Date: 8 October 1975 Genre: Letters (correspondence)
46. Letter from Daniel Nathans to Roy D. Schmickel Creator: Nathans, Daniel, 1928-1999 Date: 11 March 1969 Genre: Letters (correspondence)
47. Letter from Daniel Nathans to Ray Wu Creator: Nathans, Daniel, 1928-1999 Date: 20 December 1973 Genre: Letters (correspondence)
48. Letter from Daniel Nathans to Purnell Choppin Creator: Nathans, Daniel, 1928-1999 Date: 13 April 1994 Genre: Letters (correspondence)
49. Letter from Daniel Nathans to Paul Berg Creator: Nathans, Daniel, 1928-1999 Date: 14 February 1978 Genre: Letters (correspondence)
50. Letter from Daniel Nathans to Paul Berg Creator: Nathans, Daniel, 1928-1999 Date: 20 September 1976 Genre: Letters (correspondence)Notes