000 00307nam a2200133Ia 4500
020 _a9788170000000
082 _a628 E76
100 _aKhanna, D R (ed.)
245 _aEnvironmental technology
260 _aNew Delhi
_bDaya
_c2013
300 _ax, 325
650 _aEnvironmental technology
942 _2ddc
_cC
999 _c7660
_d7660