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Kosmos 146 Kosmos 167 Kosmos 140Tài liệu tham khảo
WikiPedia: Kosmos_146 http://www.svengrahn.pp.se/histind/Cosmos146/Cosmo... https://books.google.com.au/books?id=nVeY7vMCtOkC&... https://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay....