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Gegenschein Gegeneophis Gegenes Gegenes nostrodamus Gégény Geena Davis Genentech Gelendzhik Gengenbach GelenkhüüTài liệu tham khảo
WikiPedia: Gegenschein http://www.swisseduc.ch/stromboli/volcano/photoast... http://www.as.wvu.edu/~jel/skywatch/skw9810h.html https://archive.org/details/immortalfirewith0000sh... https://archive.org/details/immortalfirewith0000sh... https://archive.org/details/originevolutiono0000in... https://archive.org/details/originevolutiono0000in... https://archive.org/stream/Galaxy_v19n04_1961-04#p...