(3GcSjd (B2000 EXCEL : s (3ai NWhGJ SgdI (BIN EASY STEPS / s - (3NGdO GdYGeQis; (3chHSJjc, SJjaGfs; (3GSeGA ScQGfs ((3GdbGgQI (B: s (3OGQ GdaGQhb ddfTQ hGdJhRjY , s, 1999)
Keywords: (3GdMGSHGJ GdGdcJQhfjIs; (3GdHQeLIs; (3GdHQGeL GdGdjIs; (3GcSjds