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UXL Encyclopedia of Water Science
註釋Vol. 1. Science: Basics of water science -- Oceans and saltwater -- Fresh water -- Estuaries and wetlands -- Ice -- Water, weather, and climates -- Vol. 2. Economics and uses: Science and technology -- Science and research -- Economic uses of water -- Recreational uses of water -- History and culture -- Vol. 3. Issues: Environmental issues -- Legal and political issues.