Keywords: Table1 R vs P,r.jpg ja ใฟใคใ
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ขๆๆใฎๆ้้ ไฟก่ฝๅ Kardashev Nikolai 1964 Transmission of Information by Extraterrestrial Civilizations Soviet Astronomy 8 217 Bibcode 1964SvA 8 217K Tanabata yesterday night 2016-12-04 ๅฎๅฎๆๆ |