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dec 25, 1979 - Усилилось внимание к экологическому воспитанию младших школьников. Концептуальные основы этой проблемы разрабатывали И.Д. Зверев, А.Н. Захлебный, И.Т. Суравегина.
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Анна Панфилова
15 Oct 2017
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dec 25, 1979
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~ 45 years ago
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