000 00302nam a2200121Ia 4500
005 20240713152139.0
008 240712s9999 xx 000 0 und d
041 _aeng
100 _aSingh, j.b.
245 _aBhartiy vigyan evem prudhogiki ka itihas
260 _aDelhi
_b Jyotsana
_c2020
300 _a112
999 _c39446
_d39446