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Titles
- Letter from Alton Ochsner to Michael E. DeBakey6
- Letter from Walter Treadway to Lawrence Kolb3
- Letter from Alan Gregg to Walter B. Cannon2
- Letter from Catharine Macfarlane to Florence R. Sabin2
- Letter from Florence R. Sabin to Catharine Macfarlane2
- Letter from Lawrence Kolb to Lloyd H. Ziegler2
- Letter from Lawrence Kolb to Walter Treadway2
- Letter from Ralph M. Waters to Virginia Apgar2
- Letter from Alan Gregg to David L. Edsall1
- Letter from Alan Gregg to Elton Mayo1
- Letter from Charles A. Doan to Florence R. Sabin1
- Letter from Florence B. Seibert to Florence R. Sabin1
- Letter from Florence R. Sabin to Austin Joyner1
- Letter from Florence R. Sabin to Charles A. Doan1
- Letter from Frank B. Hanson to Edward L. Tatum1
- Letter from Harry Anslinger to Walter Treadway1
- Letter from K. Starr Chester, Rockefeller Institute for Medical Research to Michael Heidelberger1
- Letter from Kai O. Pedersen to Michael Heidelberger1
- Letter from Leonard Colebrook to Alan Gregg1
- Letter from Lloyd H. Ziegler to Lawrence Kolb1