cam a22 7 4500 344271404 CHVBK 20200715213713.0 131110s2002 xx 000 0 eng d (ALEX)9913366574101791 BiG BiG Weber Ralph E. Masked dispatches cryptograms and cryptology in american history, 1775-1900 Ralph E. Weber 2nd ed. [Fort George G. Meade, MD] National Security Agency, Center for Cryptologic History 2002 Text txt rdacontent/ger ohne Hilfsmittel zu benutzen n rdamedia/ger Band nc rdacarrier/ger United states Cryptologic History, Series 1, Pre-World War 1 1 BK020000 XK020000 XK020000 ALEX BIG BIG - - Magazin1 ALEX 100 1- Weber Ralph E. ALEX 490 1- United states Cryptologic History, Series 1, Pre-World War 1 1 SWISSBIB 344271404