1. Excerpt from and transcript of a diary page

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2. Letter from Joshua Lederberg to Oswald T. Avery

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3. Notes on the biological interpretation of Fred Griffith's finding

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4. Letter from Joshua Lederberg to Alvin F. Coburn

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5. Letter from Joshua Lederberg to Boris Ephrussi

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6. Letter from Joshua Lederberg to Boris Ephrussi

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7. Letter from Joshua Lederberg to "Beets" [George W. Beadle]

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8. Letter from Joshua Lederberg to Cy Levinthal

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9. Letter from Joshua Lederberg to Edward L. Tatum

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10. Letter from Joshua Lederberg to Mordecai L. Gabriel

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11. Letter from Joshua Lederberg to Marion Himes

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12. Reply to H. V. Wyatt

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13. Letter from Joshua Lederberg to Arnold W. Ravin

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14. Letter from Joshua Lederberg to Alfred E. Mirsky

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15. Letter from Joshua Lederberg to Torbjorn Caspersson

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16. Letter from Joshua Lederberg to Boris Ephrussi

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17. Letter from Joshua Lederberg to Arnold W. Ravin

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18. Letter from Joshua Lederberg to Rollin D. Hotchkiss

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19. Letter from Joshua Lederberg to Rollin D. Hotchkiss

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20. Letter from Joshua Lederberg to Robert C. Olby

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21. Letter from Joshua Lederberg to L. C. Dunn

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22. Letter from Joshua Lederberg to Bernard D. Davis

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23. Memo of telephone conversation with Kim Atwood about the early 1940s

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24. Letter from Joshua Lederberg to Gabriele Ehrlich

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25. Letter from Joshua Lederberg to Mary Washington Frazer, Tennessee State Library and Archives

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26. Letter from Joshua Lederberg to Martin R. Pollock

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27. Letter from Joshua Lederberg to L. C. Dunn

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28. [Notes on a conversation with] Pittendrigh (phone)

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29. Letter from Joshua Lederberg to Robert C. Olby

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30. Letter from Joshua Lederberg to Robert C. Olby

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31. Letter from Joshua Lederberg to Robert C. Olby

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32. Letter from Joshua Lederberg to Alfred E. Mirsky

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33. Letter from Joshua Lederberg to Torbjorn Caspersson

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34. Letter from Joshua Lederberg to Robley Williams

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35. Letter from Joshua Lederberg to Mary Washington Frazer, Tennessee State Library and Archives

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36. Letter from Joshua Lederberg to Evelyn Witkin

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37. Letter from Joshua Lederberg to Martin R. Pollock

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38. Letter from Joshua Lederberg to Martin R. Pollock

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39. Letter from Joshua Lederberg to Martin R. Pollock

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40. Reply to Gunther Stent on Alleged 'Prematurity' of the Work of Avery, MacLeod and McCarty in 'Prematurity and Uniqueness in Scientific Discovery,' Scientific American, December 1972

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41. Letter from Joshua Lederberg to Alvin F. Coburn

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42. Letter from Joshua Lederberg to Martin R. Pollock

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43. Letter from Joshua Lederberg to Vernon Bryson

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44. Memorandum from Joshua Lederberg [on conversing with Rollin Hotchkiss and Norman Zinder about Avery, Dobzhansky, and Ephrussi-Taylor]

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45. Letter from Joshua Lederberg to Maurice H. F. Wilkins

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46. McCarty at NAS 5/15/73

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47. Letter from Joshua Lederberg to Martin R. Pollock

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48. Letter from Joshua Lederberg to Martin R. Pollock

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49. Letter from Joshua Lederberg to Martin R. Pollock

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50. Notes on a Bernard D. Davis interview of Theodosius G. Dobzhansky

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