61. Letter from Daniel Nathans to Senator Tom Harkin

Date:

28 August 1990

62. Letter from Daniel Nathans to W. Barry Wood

Date:

4 February 1969

63. Letter from Daniel Nathans to Wallace P. Rowe

Date:

1 December 1975

64. Letter from Daniel Nathans to William F. Harrington

Date:

7 August 1980

65. Local Mutagenesis within Deletion Loops of DNA Heteroduplexes

Date:

December 1982

66. Local Mutagenesis: A Method for Generating Viral Mutants with Base Substitutions in Preselected Regions of the Viral Genome

Date:

May 1978

67. Maintaining and Nuturing Excellence in Science and Technology

Date:

8 August 1994

68. Memorandum from Daniel Nathans to Thomas B. Turner

Date:

4 March 1981

69. Memorandum from Daniel Nathans to W. Barry Wood

Date:

12 November 1969

70. Purification of a Supernatant Factor That Stimulates Amino Acid Transfer from Soluble Ribonucleic Acid to Protein

Date:

[August 1960]