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наблюдение природы . Huviharidussõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//has/%D0%BD%D0%B0%D0%B1%D0%BB%D1%8E%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5%20%D0%BF%D1%80%D0%B8%D1%80%D0%BE%D0%B4%D1%8B/1/rus (21.06.2026)
