The man who broke purple : the life of the world's greatest cryptologist, Colonel William F. Friedman /

Bibliographic Details
Main Author:	Clark, Ronald (Ronald William), 1916-1987
Format:	Book
Language:	English
Published:	London : Weidenfeld and Nicolson, [1977]
Subjects:	Friedman, William F. > (William Frederick), > 1891-1969. Cryptographers > United States > Biography.

Description
Item Description:	Includes index.
Physical Description:	xi, 212 pages, 4 unnumbered leaves of plates : illustrations ; 23 cm.
ISBN:	0297772791 :