00283nam a2200109Ia 4500008004100000041000800041082001900049100001500068245003700083260004500120300000800165211209s1977    xx            000 0 und d  aeng  a628.16 N77 EDW  aEDWARD D S  aWATER AND WASTE-WATER TREATMENT   aNEW YORKbMCGRAW-HILL BOOK COMPANYc1977  a382