TY  - BOOK
AU  - Hardy,  Darel W.
AU  - Richman, Fred
AU  - Walker, Carlo L
TI  - Applied algebra: : codes, ciphers, and discrete algorithms 
SN  - 9781420071429
U1  - 512 
PY  - 2009///
CY  - Boca Raton
PB  - CRC Press
ER  -