000			01491pam a2200397 a 4500
008			080304s2008 caua c 001 0 eng
010			_a 2008010029
020			_a9781595665942 (lib. bdg.)
020			_a1595665943
040			_aDLC _cDLC _dICrlF
050	0	0	_aZ103.3 _b.G55 2008
082	0	0	_a652/.8 _222
100	1		_aGilbert, Adrian.
245	1	0	_aCodes and ciphers / _cAdrian Gilbert.
260			_aLaguna Hills, CA : _bQEB Pub., _cc2008.
300			_a32 p. : _bill. (some col.) ; _c31 cm.
490	1		_aSpy files
500			_aIncludes index.
505	0		_aCodes and ciphers -- The Caesar cipher -- Code breaking -- Morse code -- Visual codes -- Navajo code talkers -- One-time pads -- Cipher machines -- Purple intelligence -- Enigma -- Secret writing -- Microdots -- Radio communications.
520			_aDiscusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers.
521	0		_a5.9 _bFollett Library Resources.
521	2		_a3-6 _bFollett Library Resources.
650		0	_aCiphers _vJuvenile literature.
650		0	_aCryptography _vJuvenile literature.
650		1	_aCiphers.
650		1	_aCryptography.
650		7	_aCiphers. _2sears.
650		7	_aCryptography. _2sears.
650		1	_aCiphers.
650		1	_aCryptography.
800	1		_aGilbert, Adrian. _tSpy files.
035			_a(SIRSI)u94061
005			20250922224216.0
001			84326
003			CSD509J
999			_c4293 _d4293