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Water quality monitoring in the Asian and Pacific region
1990
Persistent link: https://www.econbiz.de/10011970969
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Guidelines on water and sustainable development : principles and policy options
Ongley, Edwin D. - 1997
Persistent link: https://www.econbiz.de/10000977010
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Water conservation : a guide to promoting public awareness
2001
Persistent link: https://www.econbiz.de/10001654168