000 00348nam a2200145Ia 4500
005 20240713150307.0
008 240712s9999 xx 000 0 und d
020 _a9788121932165
041 _aeng
082 _a301.31
100 _aVijay kumar tiwari
245 _aParyavaran vigyan
260 _aNew Delhi
_b S.chand & co.
_c2018
300 _a485
999 _c28290
_d28290