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11. Letter from Linus Pauling to Alex R. Todd

12. Letter from Charles A. Doan to Florence R. Sabin

13. Letter from Charles A. Doan to Florence R. Sabin

14. Letter from Charles A. Doan to Florence R. Sabin

15. Letter from Charles A. Doan to Florence R. Sabin

21. Letter from DeWitt Stetten to Edward Mellanby

22. Directions for Culturing Plasma

23. Letter from Charles R. Drew to John Beattie

24. Meeting of the Committee on Research Projects

35. Letter from George W. Beadle to Warren Weaver