000 00358nam a2200145 a 4500
001 651
005 20160814164734.0
008 950206s19uu 000 0 eng d
010 _a64-13723
100 1 _aLaffin, John
245 1 0 _aCodes and ciphers; secret writing through the ages
260 _bAbelard-Schuman
_c1964
300 _a152p.
999 _c5221
_d5221