The man who broke Purple
Subtitle: the life of Colonel William F. Friedman, who deciphered the Japanese code in World War II
By: by Ronald Clark.
Edition: 1st American ed.
Publisher: Little, Brown
Published: 1977
Place of publication: Boston
Language: eng
Number of pages: 271
Subjects: Friedman, William F. 1891-1969.; Cryptographers -- United States -- Biography.
Notes: Includes index.