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Titles
- Lab notes from Michael Heidelberger and Oswald Avery's experiments on pneumococcus bacteria and polysaccharides (3 of 4)1
- Lab notes from Michael Heidelberger and Oswald Avery's experiments on pneumococcus bacteria and polysaccharides (4 of 4)1
- Letter from Alan Gregg to his mother1
- Letter from Alan Gregg to his wife1
- Letter from Alfred N. Richards to Florence R. Sabin1
- Letter from Arnold Rice Rich to Florence R. Sabin1
- Letter from C. R. Stockard to Florence R. Sabin1
- Letter from Chauncey D. Leake to Florence R. Sabin1
- Letter from Claude Forkner to Florence R. Sabin1
- Letter from David White, National Academy of Sciences to Florence R. Sabin1
- Letter from Florence R. Sabin to Robert S. Cunningham4
- Letter from Lawrence Kolb to Alexander Lambert1
- Letter from Louis Dublin to Robert Levy2
- Letter from Robert S. Cunningham to Florence R. Sabin1
- Letter from Theodore Sheldon to Florence R. Sabin1
- Letter from Virginia Apgar to Helen Apgar1
- Letter from William Charles White to Florence R. Sabin1