A qualitative classification of extraterrestrial civilizations
نویسندگان
چکیده
منابع مشابه
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2020
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/202037597