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5231. Letter from Joshua Lederberg to William G. Bowen

5233. Letter from Ernest Nagel to Joshua Lederberg

5234. Science Can't Be Dogmatic About Virgin Birth in Man

5236. Letter from Joshua Lederberg to David L. Nanney

5237. Letter from Unknown to Joshua Lederberg

5238. Letter from Joshua Lederberg to Purnell Choppin

5239. Letter from Joshua Lederberg to F. Ratliff

5240. Unpredictable Variety Still Rules Human Reproduction