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2
-
The suitability of iodine and iodine compounds as desinfectants for small water supplies / by B.C.J. Zoeteman.
- WHO. International reference centre for community water supply (IRC),
- 1972.
- The Hague :
-
Educational innovations in Africa : policies and administration / ed. J.A. Ponsioen.
- 86
- Institute of social studies,
- 1972.
- The Hague :