Оценка загрязненности водных ресурсов : метод. пособие для практ. занятий по дисциплине «Основы экологии и энергосбережения»

24 Pages · 2016 · 631 KB · Russian
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“ Before you speak, let your words pass through three gates: Is it true? Is it necessary? Is it kind? ” ― Rumi
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