PROTECTION OF STANDING WATERS (ENVIRONMENTAL PROBLEMS)
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BTPROTECTION OF SURFACE WATERS (ENVIRONMENTAL PROTECTION)
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BTSTILL WATERS (POLLUTION AND PROTECTION OF WATERS)
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BTHYGIENE OF WATER, PROTECTION OF WATER QUALITY, CONSERVATION OF WATER RESOURCES (ENVIRONMENTAL PROTECTION)
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UDC504.455.06
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Descriptor GERSCHUTZ STEHENDER GEWÄSSER (UMWELTPROBLEME)
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Descriptor ENGPROTECTION OF STANDING WATERS (ENVIRONMENTAL PROBLEMS)
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Descriptor FREPROTECTION DES EAUX STAGNANTES (PROBLÈMES ENVIRONNEMENTAUX)
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Variant GERGEWÄSSERSCHUTZ/STEHENDE GEWÄSSER (UMWELTPROBLEME)
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Variant GERSTEHENDE GEWÄSSER/GEWÄSSERSCHUTZ (UMWELTPROBLEME)
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Variant ENGSTANDING WATERS/PROTECTION OF WATERS (ENVIRONMENTAL PROBLEMS)
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Variant ENGWATER PROTECTION/STANDING WATERS (ENVIRONMENTAL PROBLEMS)
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Variant FREEAUX STAGNANTES/PROTECTION DES EAUX (PROBLÈMES ENVIRONNEMENTAUX)
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RTLAKES (POLLUTION AND PROTECTION OF WATERS)