000 00339nam a2200145Ia 4500
008 220314s9999||||xx |||||||||||||| ||und||
080 _a510
100 _aCoutinho, S C
245 0 _aMathematics of ciphers
260 _bUniversities Press Ltd., Hyderabad
_c1999
300 _a196
490 _aR
650 _aMathematics
942 _cBOOK
999 _c9126
_d9126