na INLIS000000000011189 20130612102758 Ind 010-061300000011189 Ind 372.7 372.7, Sup a Supriyono Abakus 2a, Bina mental aritmatika, Drs.Supriono ; Suprianto [19] Surabaya VI-90 hlm, ilus, 21 cm Suprianto NBPNMAT