000 00516nam a2200181u 4500
001 00125814
003 PWmBRO
005 20190304163433.0
008 960923s1961 us b 0000 eng c
100 1 0 _aPeck, Lyman C.,
_d1920-
245 1 0 _aSecret codes, remainder arithmetic, and matrices /
_cLyman C. Peck.
260 0 _aReston, Virginia :
_bNational Council of Teachers of Mathematics,
_c1961.
300 _a54 p. :
_bill.
650 0 _aArithmetic.
650 0 _aCiphers.
650 0 _aMatrices.
942 _2ddc
999 _c92895
_d92895