Citace podle APA (7th ed.)

Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.

Citace podle Chicago (17th ed.)

Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. Groningen, Holanda: University of Groningen.

Citace podle MLA (8th ed.)

Não informado. Publications of the Kapteyn Astronomical Laboratory at Groningen. University of Groningen.

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