00410nam a2200145Ia 4500008004100000082002100041100001200062245004000074260003800114300000800152650003800160650003400198653001200232653002000244170901s1980    xx            000 0 und d  a628.168817bS80R  aChem, C 0aRiver Pollution ControlbStiff, M.J  aEnglandbEllis Horwood Ltd.c1980  a423  aEngineering and allied operations  aTechnology (Applied sciences)  aControl  aRiver pollution