1. Dr. Francis J. Ryan at work at Columbia University

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2. Dr. Francis J. Ryan with a dogfish

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3. 1958 Nobel Prize diploma

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4. Telegram from Sten Friberg to Joshua Lederberg

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5. 1958 Nobel Prize recipients in Chemistry, Physics, and Physiology or Medicine

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6. Joshua Lederberg's Nobel medal

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7. Joshua Lederberg at the 1958 Nobel Prize Ceremony

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8. Joshua Lederberg

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9. Edward L. Tatum at Stanford University

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10. 1958 Nobel Prize recipients in Chemistry, Physics, and Physiology or Medicine

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11. Joshua Lederberg with Alex Zaffaroni and J. E. Wallace Sterling at the Syntex Institute for Molecular Biology

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12. Boris Rotman, John Zderic, Wilfred Razell, and John Moffat at the Syntex Institute for Molecular Biology

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13. Joshua Lederberg with G. Rosenkrantz at the Syntex Institute of Molecular Biology

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14. Joshua Lederberg at the American Society of Microbiology Centennial Meeting

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15. Joshua Lederberg with Maclyn McCarty

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16. Joshua Lederberg with Abe Eisenstark

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17. Joshua Lederberg at the American Society of Microbiology Centennial Meeting

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18. Joshua Lederberg with Richard Guildlichter(?)

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19. Joshua Lederberg with Abe Ribicoff and Wendell Stanley at the White House

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20. Stanford University Genetics Department

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21. Theodosius Dobzhansky

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22. Joshua Lederberg and Luca Cavalli-Sforza in a playful mood

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23. Ruth Sager and Bernard D. Davis

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24. Yukinori Hirota and his wife, Aiko

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25. Gene Recombination in Escherichia coli

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26. Letter from Joshua Lederberg to Kimball Atwood

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27. Letter from Francis J. Ryan to Joshua Lederberg

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28. Letter from Francis J. Ryan to Joshua Lederberg

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29. Letter from Joshua Lederberg to Francis J. Ryan

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30. Letter from Joshua Lederberg to Francis J. Ryan

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31. Genetic Recombination in Escherichia coli: Disputation at Cold Spring Harbor, 1946-1996

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32. Letter from Joshua Lederberg to Rene J. Dubos

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33. Letter from Joshua Lederberg to John Burton Sanderson Haldane

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34. Letter from Joshua Lederberg to Aura E. Severinghaus

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35. Commonplace Notes

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36. Letter from Joshua Lederberg to Aura E. Severinghaus

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37. Letter from Joshua Lederberg to Edward L. Tatum

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38. Letter from Joshua Lederberg to Salvador E. Luria

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39. Letter from Joshua Lederberg to Tracy M. Sonneborn

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40. Letter from Joshua Lederberg to P. R. Edwards

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41. Gene Recombination in the Bacterium Escherichia coli

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42. Novel Genotypes In Mixed Cultures of Biochemical Mutants of Bacteria

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43. [Laboratory notebook entry], 2 June 1946

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44. Francis J. Ryan

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45. Reverse-Mutation and Adaptation in Leucineless Neurospora

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