Não informado. (2001). Bulletin of the Astronomical Institutes of Czeschoslovakia. Astronomical Institutes of Czeschoslovakia.
Citace podle Chicago (17th ed.)Não informado. Bulletin of the Astronomical Institutes of Czeschoslovakia. Prague: Astronomical Institutes of Czeschoslovakia, 2001.
Citace podle MLA (8th ed.)Não informado. Bulletin of the Astronomical Institutes of Czeschoslovakia. Astronomical Institutes of Czeschoslovakia, 2001.
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