Masked dispatches
Subtitle: cryptograms and cryptology in American history, 1775-1900
By: Ralph E. Weber
Contributors: United States. National Security Agency/Central Security Service. Center for Cryptologic History
Edition: 2nd ed. 2002
Series: United States cryptologic history -- v. 1
Publisher: Center for Cryptologic History, National Security Agency
Published: 2002
Place of publication: [Fort George G. Meade, MD]
Language: eng
Format: Microform
Number of pages: 227
Subjects: Cryptography -- United States -- History -- To 1900
Notes: "First edition 1993."

Shipping list no.: 2002-0529-M

"CCH-EC-02-03"--Cover

Includes bibliographical references (p. 225-227)

Microfiche. [Washington, D.C.] : Supt. of Docs., U.S. G.P.O., 2002 3 microfiches : negative