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...
Gorde:
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| Formatua: | Baliabide elektronikoa Bideoa Software |
| Hizkuntza: | English |
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Nairobi Kenya :
ACE communications,
1990.
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| Edizioa: | TVE international. |
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Not a dirty word : Environment / 
Water and sanitation in the world's cities : local action for global goals /