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6341. Viable Substitute Proposed for Detergent Phosphates

6344. Letter from David Barnette to Joshua Lederberg

6346. Dramatic Results Unlikely from Replacing Phosphates

6347. Letter from Edward P. Bass to Joshua Lederberg

6348. Letter from Geoffrey H. Beale to Joshua Lederberg

6349. Letter from Rodney R. Beard to Joshua Lederberg

6350. Letter from Barton Childs to Joshua Lederberg