Observations of Variable Stars: Proefschrift Ter Verkrijging Van Den Graad Van Doctor in De Wis-En Sterrekunde Aan De Rijksuniversiteit Te Leiden, Op ... Hoogleeraar in De Faculteit Der Geneskunde - Softcover

Inhaltsangabe

Excerpt from Observations of Variable Stars: Proefschrift Ter Verkrijging Van Den Graad Van Doctor in De Wis-En Sterrekunde Aan De Rijksuniversiteit Te Leiden, Op Gezag Van Den Rector-Magnificus R. P. Van Calcar, Hoogleeraar in De Faculteit Der Geneskunde

During the whole time of observation about 13500 obs. Were secured, divided as follows over the different classes.

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