000 00297nam a2200121Ia 4500
005 20240713150737.0
008 240712s9999 xx 000 0 und d
041 _aeng
100 _aBhatnagar, a.b.
245 _aPedagogy of school subject scinece
260 _aMerath
_b R.Lal book
300 _a438
999 _c30953
_d30953