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Международные стандарты питьевой воды
- 614.34 I61217 1973
- World Health Organization,
- 1973.
- Geneva :
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Technological information systems and services for innovation : a selective bibliography = Systèmes et services d'information technique traitant de l'innovation : bibliographie sélective = Servicios y sistemas de información tecnologica que fomentan la innovación : bibliografÃa selectiva / United Nations library.
- United Nations,
- 1973.
- Geneva :