Masked dispatches [microform] : cryptograms and cryptology in American history, 1775-1900 / Ralph E. Weber 2nd ed. 2002 (United States cryptologic history. Series 1, Pre-World War I ; v. 1)
Masked dispatches [microform] : cryptograms and cryptology in American history, 1775-1900 / Ralph E. Weber
2nd ed. 2002
(United States cryptologic history. Series 1, Pre-World War I ; v. 1)