000 00302nam a2200121Ia 4500
008 250409s9999 xx 000 0 und d
020 _a8170413524
082 _a628.5
_bTYA
100 _aTyagi,O.D Mehra,M
245 0 _aEnvironmental Chemistry
260 _aNew Delhi
_bAnmd Pub,
_c1996
365 _a85
999 _c247936
_d247936