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1131. Letter from Francis Crick to Max Delbruck

1134. Letter from George Gamow to Francis Crick

1135. Letter from J. T. Randall to Francis Crick

1136. Fragment of speaking notes on DNA replication

1137. Letter from George Gamow to Francis Crick

1138. Letter from George Gamow to Francis Crick

1140. Letter from James D. Watson to Francis Crick