21. Letter from Ray Wu to Daniel Nathans Creator: Wu, RayNew York State College of Agriculture and Life Sciences Date: 11 December 1973 Genre: Letters (correspondence)
22. Letter from Roy D. Schmickel to Daniel Nathans Creator: Schmickel, Roy D.University of Michigan. University Hospital Date: 29 September 1976 Genre: Letters (correspondence)
23. Specific Cleavage of Simian Virus 40 DNA by Restriction Endonuclease of Hemophilus Influenzae Creator: Danna, Kathleen J.Nathans, Daniel, 1928-1999 Date: December 1971 Publisher: National Academy of Sciences (U.S.) Genre: Articles
24. Studies of SV40 DNA: VI. Cleavage of SV40 DNA by Restriction Endonuclease from Hemophilus Parainfluenzae Creator: Sack, George H., Jr.Nathans, Daniel, 1928-1999 Date: [February 1973] Publisher: The Academic Press Genre: Articles
25. The Isolation of Simian Virus 40 Variants with Specifically Altered Genomes Creator: Brockman, William W.Nathans, Daniel, 1928-1999 Date: March 1974 Publisher: National Academy of Sciences (U.S.) Genre: Articles