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502. The Code of Life Finally Cracked

507. Letter from Evelyn Berk to Marshall W. Nirenberg

511. Letter from Sol Spiegelman to Francis Crick

512. The Relation of Informational RNA to DNA

513. On the Energy Transfer in Biological Systems

514. In Search of New Biological Dimensions

515. Letter from Clarence Dennis to Karl E. Karlson

516. Letter from Karl E. Karlson to Clarence Dennis

518. Letter from Clarence Dennis to Karl E. Karlson

519. Letter from Clarence Dennis to John H. Peters

536. A First for Aging

540. National Goals in Medical Research and Education

541. Blueprint for Action

544. Letter from John E. Fogarty to Sidney R. Yates

545. Letter from G. Donald Whedon to John E. Fogarty

546. Letter from Sidney R. Yates to John E. Fogarty

547. Letter from John E. Fogarty to Jack R. Ewalt

550. Letter from Jack R. Ewalt to John E. Fogarty