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Titles
- Excerpt from Fredrickson's diary on the release of the recombinant DNA guidelines into the Federal Register1
- Letter from Daniel Nathans to Paul Berg1
- Letter from Paul Berg to Daniel Nathans1
- Letter from Roy Curtiss III to Donald S. Fredrickson1
- Letter from Stanley N. Cohen to Maxine Singer1
- Memorandum from Maxine Singer to Donald S. Fredrickson1