Codes galore
By: Joseph Malkevitch, Gary Froelich, Daniel Froelich.
Contributors: Froelich, Gary W.; Froelich, Daniel.; History of Mathematics and Its Applications Project (HistoMAP); High School Mathematics and Its Applications Project.; Consortium for Mathematics and Its Applications (U.S.)
Series: HiMAP -- module 18; HistoMAP
Publisher: COMAP, Inc.
Published: 1993
Place of publication: Lexington, MA
Language: eng
Number of pages: 84
Subjects: Ciphers.; Mathematics -- Study and teaching (Secondary)
Notes: Includes transparencies.

Includes bibliographical references (p. 51-53).