TY  - BOOK
AU  - Hardy Darel W
AU  -  Richman Fred
AU  -  Walker Carol L
TI  - Applied algebra : Codes, ciphers and discrete algorithms
T2  - Descrete mathematics and its applications
U1  - B2, P9 
PY  - 2009///
CY  - Boca Raton
PB  -  CRC Press     
KW  - Mathematics
ER  -