000 00379 a2200145 4500
020 _a8174884351
082 _a363.7394
_bENC
090 _c15221
_d22898
100 _aChhatwal, G.R.
_eed.
245 _aEncyclopadia of environmental water pollution
260 _aNew Delhi
_bAnmol Publication
_c1996
_g2003
300 _avii,296p.
_c24cm
650 _aWater Polution
942 _cPR
999 _c43346
_d43346