Ирина Безбородова - экскурсовод по призванию
Урюпинское телевидение
Наша группа Вконтакте
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![[M21] Излучение абсолютно чёрного тела](https://sun9-33.userapi.com/UabCZnIbm7oLeIGUpet2kvqwtJzcBw41BQ4Isg/TyQlLdQno18.jpg)
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