00493nam a2200169Ia 4500 180921t1987 xxu||||| |||| 00| 0 sin d sin 5 NAV නව විද්‍යා ප්‍රවෙිශය 11 වසර Nava vidyaa praveshhaya .11 vasara Department of Education 1987 179p., ill., 25 cm O/L science Text book BK 0 0 0 0 SCI MAIN MAIN 2023-06-11 5 NAV 132334 2023-06-11 2023-06-11 BK 16695 16695 LK-CoDNM LK-CoDNM LK-CoDNM LK-CoDNM