Alles van: K.Aa. Strand
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K.Aa. Strand Photographic measurements of the six double stars [êta] Cassiopeia, γ Virginis, [xi] Bootis, 44i Bootis, [sigma] Coroneae Borealis, 70 Ophiuchi, and the computation of their orbits with special attention to these measurements
Engels | 138 pagina's | Enschedé, Haarlem | 1937
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