WATER-QUALITY INTERNATIONAL 94 .5. WATER-QUALITY MANAGEMENT IN CENTRAL AND EASTERN-EUROPE - INTEGRATED CATCHMENT MANAGEMENT - POLLUTION PREVENTION WASTE MINIMIZATION - TRAINING AND MANAGEMENT - PROCEEDINGS OF THE 17TH BIENNIAL CONFERENCE OF THE INTERNATIONAL-ASSOCIATION-ON-WATER-QUALITY, HELD IN BUDAPEST, HUNGARY, 24-30-JULY-1994 - PREFACE
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