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astronomers 2 astronomové 2 learned institutions and societies 2 učené společnosti 2 Christian theologians 1 Doppler effect 1 Dopplerův jev 1 more ...
astronomers 2 astronomové 2 learned institutions and societies 2 učené společnosti 2 Christian theologians 1 Doppler effect 1 Dopplerův jev 1 more ...
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