000
00311nam a2200133Ia 4500
008
240227s9999 xx 000 0 und d
041
_a
Sinhala
245
0
_a
මිනිතය
260
_b
NIE,
_c
1986
300
_a
40p;
_b
ill.;
_c
28cm
650
_a
Mathematics
658
_a
Distance Education
942
_c
MD
999
_c
98250
_d
98250