000
00230nam a22001097a 4500
003
SGT
082
_a
370
_b
MAN
100
_a
MANGAL, S.K.
245
_a
LEARNING AND TEACHING
260
_a
DELHI
_b
SHIPRA
_c
2017
942
_2
ddc
_c
BK
_0
13
999
_c
17138
_d
17138