00598oam 2200181z- 450 9910693668803321(CaSebORM)01120100004SI(CKB)4100000011375903(EXLCZ)99410000001137590320230516c2001uuuu -u- -engInvisible cryptologists : African Americans, WWII to 1956Fort George G. Meade, MdCenter for Cryptologic History, NSAInvisible CryptologistsBOOK9910693668803321Invisible cryptologists : African Americans, WWII to 19563196144UNINA