00349nam a2200133Ia 4500008004100000020001500041041001200056082001100068100001500079245006300094260003600157300000800193650001400201221030s9999    xx            000 0 und d  a8121908833  aEnglish  a105.23  aS. S. Dara 2aA Text Book of Environmental Chemistry & Pollution Control  bS. Chand & Co.aNew Delhic2008  a402  aChemistry