Author:
Likhachev S. F.,Kardashev N. S.
Subject
Astronomy and Astrophysics,Instrumentation
Reference11 articles.
1. Intuitionism and formalism
2. Kardashev, N. S. 1969.Extraterrestrial Civilizations, 25–101. Moscow: Nauka. (in Russian)
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1 articles.
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1. Space program for SETI;Acta Astronautica;1998-05