00460nam a2200145Ia 450000500170000000800410001704100080005808200150006610000260008124500390010726000380014630000090018499900190019395201020021220260720174550.0260720s2004    xx            000 0 und d  aeng  a372.8 KUMT  aKumar, Arvind9268278  aTextbook of enviournmental science  aNew DelhibA P H Publishingc2004  a376p  c242356d242356  001040708BEDaALbALd2026-07-20l0o372.8 KUMTpBED00748r2026-07-20 17:45:50w2026-07-20yBK