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Исследование водных объектов (apr 15, 1919 – apr 15, 1941)

Description:

Количество гидропостов на реках и озерах республики выросло до 170. На них проводились наблюдения за уровнем воды и гидро- логическим режимом.

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География

11 Nov 2019

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Date:

apr 15, 1919

apr 15, 1941

~ 22 years

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