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6301. Letter from M. L. Morse to Joshua Lederberg

6303. Letter from Joshua Lederberg to Jack Edman

6305. Fingerprints are Permanent from Third Month of Life

6306. Mars Germ Peril Cited by Expert

6307. The Moral Issue of Science is Lack of Science of Peace

6308. Invasion from Mars? Microbes!

6309. Dr. Lederberg Speaks Out on Biological Warfare Hazards