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This 1950s' film looks at the measures to preserve water flow from the Rocky Mountains. With the steady falling of the water table, the exploitation of timber stands and the recession of glaciers, water conservation was an urgent concern of the Alberta and federal governments.
Выпуск: Jan 01, 1951
Время выполнения: 18 минут
Язык:
Студия: ONF | NFB
Страна: Canada
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