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København: Munksgaard, 1948
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Stockholm: Almqvist & Wiksells boktryckeri ab, 1951
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Lund, 1949
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Lille: A. Taffin-Lefort, 1947
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København: Munksgaard [in Komm.], 1968
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American Astronomical Society, 1954
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Cambridge University Press (CUP), 1950
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American Astronomical Society, 1949
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Springer Science and Business Media LLC, 1992
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Elsevier BV, 1992
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Ovid Technologies (Wolters Kluwer Health), 1983