Концепция глубинного общества на английском. Состояние и перспективы
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![Путешествие длиною в жизнь [Межзвёздный ковчег и глубокий космос]](https://sun9-62.userapi.com/lRIMVPUzfn14Iox9bzXsjruaDYOzIMlN1IJHrw/_v72tazZW3I.jpg)
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