00306nam a2200109Ia 4500008004100000041000800041082001800049100003800067245004300105260004000148300000800188211209s1990    xx            000 0 und d  aeng  a628.3 N90 INS  aINSTITUTION OF CHEMICAL ENGINEERS  aEFFLUENT TREATMENT AND WASTE DISPOSAL   aNEW YORKbHEMISPHERE PUB. CO.c1990  a402