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Unpublished book manuscript by the U.S. codebreaker Elizebeth Smith Friedman about how to break codes and solve cryptogram puzzles. The book is aimed at young adults. George C. Marshall Research Library location: ESF Collection, box 9, file 12.
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Elizebeth Friedman · codebreaking · codebreaker · cryptanalysis · cryptanalyst · U.S. Coast Guard · William Friedman