000 00295nam a2200121Ia 4500
005 20240713150308.0
008 240712s9999 xx 000 0 und d
041 _aeng
100 _aVijay kumar tiwari
245 _aParyavaran vigyan
260 _aNew Delhi
_b S.chand & co.
_c2018
300 _a485
999 _c28292
_d28292