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501. Letter from Wolf Vishniac to Joshua Lederberg

502. Letter from Wolfram Heumann to Joshua Lederberg

503. Letter from Wolfram Heumann to Joshua Lederberg

504. Letter from Yukinori Hirota to Ida Orskov

505. Letter from Yukinori Hirota to Ida Orskov

506. Letter from Yukinori Hirota to Joshua Lederberg

511. Man's Role in the National Space Program

512. Mare's Hormone Aids Heart Cases

516. Memorandum from Eric Hutchinson

517. Memorandum from Frank R. Mayo to Joshua Lederberg

518. Memorandum from Frank R. Mayo to Joshua Lederberg

522. Memorandum from Joel Orlen

524. Memorandum from Joshua Lederberg

525. Memorandum from Joshua Lederberg

541. The Molecular Structure of Polyadenylic Acid

544. The Narcotics Problem--In Proper Perspective

545. National Goals in Medical Research and Education

549. On the Energy Transfer in Biological Systems