41. Letter from Bernard Weisblum to Daniel Nathans

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42. Letter from Daniel Nathans to Bernard Weisblum

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43. Data on SV, JC, and BK cleavage

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44. Letter from David C. Ward to Daniel Nathans

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45. Letter from David C. Ward to Daniel Nathans

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46. Letter from Daniel Nathans to David C. Ward

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47. Letter from Daniel Nathans to Ernest Winocour

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48. Letter from Ernest Winocour to Daniel Nathans

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49. Letter from Daniel Nathans to Maxine Singer

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50. Letter from Maxine Singer to Daniel Nathans

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51. Letter from Ernest Winocour to Daniel Nathans

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52. Letter from Daniel Nathans to Ernest Winocour

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53. Letter from Oliver H. Lowry to Daniel Nathans

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54. Letter from Daniel Nathans to Byron Lane

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55. Letter from Daniel Nathans to Senator Tom Harkin

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56. Evolutionary Variants of Simian Virus 40: Cloned Substituted Variants Containing Multiple Initiation Sites for DNA Replication

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57. Memorandum from W. Barry Wood to David E. Rogers

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58. Memorandum from Daniel Nathans to W. Barry Wood

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59. Letter from Rebecca S. Eisenberg to Daniel Nathans

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60. Letter from Daniel Nathans to William F. Harrington

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