Codes and ciphers

Discusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers.

9780329743215
book

Holdings

hidmidmiidnidwidlocation_codelocationbarcodecallnumdeweycreatedupdated
167237952873422245750404135043WCES509027025686652 GIL65215825759371709307855