Not a dirty word : Environment /
The latest U.N. assessment is that 1.1 billion people live without access to clean drinking water and more than twice that number is denied hygienic means of sanitation...
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| 格式: | 電子 影片 軟件 |
| 語言: | English |
| 出版: |
Nairobi Kenya :
ACE communications,
1990.
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| 版: | TVE international. |
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Not a dirty word : Environment / 
Water and sanitation in the world's cities : local action for global goals /