29 окт 1977 г. - In 1977 the emerging problems related to water scarcity led to the United Nations Water Conference (Mar del Plata, Argentina).

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In 1977 the emerging problems related to water scarcity led to the United Nations
Water Conference (Mar del Plata, Argentina).

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25 янв 2018

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Richard Thurston's Water TImeline

Water History Timeline

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