003420000a22001330004500060000800000082001400008100001600022245005500038250000600093260005200099260000900151300000800160650004000168  a100  a628.1 HUS  aHusain, S K  aText book of water supply and sanitary engineering  a2  aNew Delhi, Oxford & IBH publishing co. pvt. ltd  c1974  a882  aWater supply / sanitary engineering