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Titles
- Letter from Barbara McClintock to Curt and Evelyn Stern2
- Letter from Michael E. DeBakey to his father, Shaker2
- Letter from Alan Gregg to Harvey Cushing1
- Letter from Austin Brues to Clarence Dennis1
- Letter from Florence R. Sabin to George W. Corner1
- Letter from Frank S. Burch to Clarence Dennis1
- Letter from H. B. Zimmermann to Clarence Dennis1
- Letter from Harvey Cushing to Alan Gregg1
- Letter from Kai O. Pedersen to Michael Heidelberger1
- Letter from Linus Pauling to Professor Noyes1
- Letter from Oswald T. Avery to Roy and Catherine Avery1
- Letter from Owen H. Wangensteen to Harry P. Ritchie1
- Letter from Robert S. Cunningham to Florence R. Sabin1
- Letter from Warren Weaver to Linus Pauling1