000 00420cam a2200145 i 4500
020 _a084656713X
040 _cDLC
082 0 0 _a512 CUM 1975 A032 Or.
_a513/.2
100 1 _aSiner, Helen B.
245 1 0 _aPractical mathematics :
_bdecimals, ratios, proportions, and percents /
260 _aMenlo Park, Calif. :
_bCummings Pub. Co.,
_c[1975]
300 _a104 p. :
_bill. ;
_c24 cm.
650 0 _aArithmetic.
942 _cEK
999 _c12166
_d12166