TY  - BOOK
AU  - Peck,Lyman C.
TI  - Secret codes, remainder arithmetic, and matrices
PY  - 1961///]
CY  - Washington
PB  - National Council of Teachers of Mathematics
KW  - Arithmetic
KW  - Local
KW  - Ciphers
KW  - Matrices
N1  - Includes bibliography
ER  -