Cryptology References
Intel Corporation (1995). The Journey Inside: The computer (kit).
Keller, E. (1992). The Big Book of Ready to Use Theme Units
. Scholastic Internet Libraries.
Snyder, L. (1994). Cryptogrammer Software. Internet archives.
World Book Encylopedia (1989). The World Book Encylopedia.
Sears, P. (1986). Secret Writing: Keys to the Mysteries of Reading and Writing.
Teachers & Writers Collaborative program.
Miller, Marvin. Boy's Life: Codemaster Series. Boy Scouts of America.
Konheim, A. (1981). Cryptography A Primer. John Wiley & Sons.
Sinkov, A. & Irwin, Paul (1980). Elementary Cryptanalysis A Mathematical Approach.
Mathematical Association of America.
Kohn, B. (1968). Secret Codes and Ciphers. Prentice Hall.
Laffin, J. (1964). Codes and Ciphers. Abeland-Schuman.
Epstein, S. & Epstein, B. (1956). The first book of codes and ciphers. Franklin
Watts.