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1481. Letter from Francis Crick to Leslie E. Orgel

1482. Letter from Francis Crick to Leslie E. Orgel

1483. Letter from Leslie E. Orgel to Francis Crick

1484. Letter from Francis Crick to Linus Pauling

1485. Letter from Linus Pauling to Francis Crick

1486. Letter from Karl Popper to Francis Crick

1487. Letter from Francis Crick to James D. Watson

1488. Letter from Francis Crick to Karl Popper

1489. Letter from Francis Crick to Henry M. Sobell

1490. Letter from Henry M. Sobell to Francis Crick