TY - BOOK ED - Scottish Development Department TI - Towards cleaner water 1975: report a second rivers pollution survey of scotland U1 - 333.91 PY - 1976/// CY - Edinburgh PB - HMSO KW - Agua KW - Contaminación N1 - Impreso; 06580; Scope. Legislative and administrative framework of water pollution control. Capital expendium. Discharges of crude sewage and treated sewage effluent. Direct industrial discharges. Unsatisfactory storm overflows. Synthetic detergents. Ferruginous discharges. Chemical classification of rivers. Biological classification. Comparison of survey results ER -