00440nam a22001452  4500001001100000005001700011008004100028020002600069040001500095100003000110245005900140260003400199300001800233650004300251000000914520151217152050.0080907s         xx           000 0 eng d  a8121915473 :cKES 390  aKABUcKABU1 aDuggal, K. N.@000016021310aElements of environmental engineering /cK. N. Duggal.  aNew Delhi :bS. Chand,c2007.  axvii, 440  p. 0aEnvironmental engineering.@0000156200