1. Letter from Daniel Nathans to Ernest Winocour

Date:

1 December 1971

2. Letter from Daniel Nathans to Kathleen J. Danna

Date:

22 February 1973

3. Letter from Daniel Nathans to Maxine Singer

Date:

1 March 1972

4. Letter from Ernest Winocour and Maxine Singer to Daniel Nathans

Date:

4 July 1972

5. Letter from Ernest Winocour to Daniel Nathans

Date:

4 November 1971

6. Letter from Maxine Singer to Daniel Nathans

Date:

14 March 1972

7. Specific Cleavage of Simian Virus 40 DNA by Restriction Endonuclease of Hemophilus Influenzae

Date:

December 1971