00309nam a2200109 a 450000500170000002000150001708200160003210000230004824500610007126000410013230000260017320251203110922.0  a1584884703  a005.82bMOL  aMollin, Richard A.  aCodesbThe guide to secrecy from ancient to modern times  aNew YorkbChapman & Hall / CRCc2005  aXXc679p.c24 cm.cHB