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Das photographische Helligkeitsverhältnis der Sonne zu fixsternen ...Birck, Otto, January 1909 (has links)
Inaug.-diss.-Göttingen. / Includes bibliographical references.
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Das photographische Helligkeitsverhältnis der Sonne zu fixsternen ...Birck, Otto, January 1909 (has links)
Inaug.-diss.-Göttingen. / Bibliographical foot-notes.
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