000
00253nam a2200121Ia 4500
008
230321s9999 xx 000 0 und d
082
_b
PED
100
_a
---
245
0
_a
Pedagogy of mathematics
260
_b
NCERT
_c
2012
300
_a
326
942
_c
BK
999
_c
3218
_d
3218