000 nam a22 7a 4500
999 _c51496
_d51496
003 OSt
005 20220331161449.0
008 220331b xxu||||| |||| 00| 0 eng d
040 _csero soft
100 _aTyagi ,Gursharandas
245 _aknowledge and curriculum
260 _aAgra
_bvinod pustak
300 _a394
942 _2ddc
_c02