The invisible cryptologists : African-Americans, WWII to 1956 / by Jeannette Williams with Yolande Dickerson, researcher. [O'Reilly electronic resource]
Imprint
[Fort George G. Meade, Md.] : Center for Cryptologic History, National Security Agency, 2001.
"The story of African-Americans employed by the National Security Agency and its predecessors. It tells of the movement of African-Americans from low-level jobs in segregated work units to their rise to key positions in NSA's structure"--Resource description page.