Investigators Guide to Steganography

Carvin, A., Hidden in Plain Sight: The Debate Over Steganography, Benton Foundation, 2001, [www.urbanthinktank.org/steganography.cfm.]

Hayhurst, J.D., O.B.E., The Pigeon Post into Paris 1870–1871, 1970.

Judge, J.C., Steganography: Past, Present, and Future, SANS, 2001.

Kahn, D., The Codebreakers, Macmillan, New York, 1967, p. 131.

Maxemchuk, N.F., "Electronic document distribution," AT&T Technical Journal, 73, 5 (Sep/Oct 1994), 73–80.

Pennypacker, M., George Washington's Spies: In Long Island and New York, Long Island Historical Society, 1939.

Singh, S., The Code Book: The Evolution of Secrecy from Mary Queen of Scots to Quantum Cryptography, Doubleday, New York, 1999.

Spy Letters of the American Revolution: The Culper Gang, June 27, 1779, George Washington to Benjamin Tallmadge.

Tobin, J.L. et al., Hidden in Plain View: A Secret Story of Quilts and the Underground Railroad, Anchor, U.K., 2000.

Way, P., Codes and Ciphers, Crescent Books, 1977.