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Results of Measures Made at the Royal Observatory, Greenwich, Under the Direction of W.H.M. Christie ... Astronomer Royal, of Photographs of the Sun Taken at Greenwich, in India, and in Mauritius in the Year 1901-1955
Royal Greenwich Observatory
出版Royal Greenwich Observatory, 1924
URLhttp://books.google.com.hk/books?id=Hx8zAQAAMAAJ&hl=&source=gbs_api