• 4 Memorial Library

• 4 Pollution
• 2 Bathing beaches
• 2 Water quality
• 2 Water quality management
• 2 Water-supply
• 1 Government policy
• 1 Law and legislation
• 1 Periodicals
• 1 Water resources development

• 2 European Commission
• 2 European Environment Agency
• 2 European Topic Centre on Inland Waters

• 5 English

• 2 Pays de l'Union européenne
• 1 4
• 1 Grande-Bretagne
• 1 Great Britain

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