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3
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The purification of water on a small scale / [based on a paper of R.N. Clark ; rev. by International reference centre for community water supply].
- WHO. IRC,
- 1973.
- The Hague :
-
Plastic pipe in drinking water distribution practice (introduction and bibliography up to 1970) / [prep. by International reference centre for community water supply].
- WHO. IRC,
- 1971.
- The Hague :
-
Symposium on community water supply in development cooperation, Amsterdam, 7-10 February 1977 : report / International reference centre for community water supply.
- WHO. IRC,
- 1977.
- The Hague :