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1441. Letter from Francis Crick to Cy Levinthal

1442. Letter from Cy Levinthal to Francis Crick

1443. Molecular Genetics: The Ideas

1444. Letter from Francis Crick to Cy Levinthal

1445. Letter from Francis Crick to Robert W. Holley

1446. Letter from Carl C. Lindegren to Francis Crick

1447. Letter from Francis Crick to Carl C. Lindegren

1448. Letter from Francis Crick to Fritz Lipmann

1449. Letter from Francis Crick to Clyde Manwell

1450. Letter from Francis Crick to Peter Medawar