na JATIM-06090000035744 20090625132633.0 ind 0010-060900000035744 0 CB/D13 2002-11 Drs. Supriyono 0 Abakus 4a bina mental aritmatika Surabaya SIC 2002 v., 82 hlm.; 21 cm. 0 0 Suprianto 1 0