A qualitative classification of extraterrestrial civilizations (Q113360257)
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scientific article published in July 2020
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | A qualitative classification of extraterrestrial civilizations |
scientific article published in July 2020 |
Statements
A qualitative classification of extraterrestrial civilizations (English)
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July 2020
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639
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A94
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