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Papers Relating to the Transit of Venus in 1874, Prepared Under the Direction of the Commission Authorized by Congress and Published by Authority of the Hon. Secretary of the Navy
United States. Transit of Venus commission
出版U.S. Government Printing Office, 1872
URLhttp://books.google.com.hk/books?id=CxFTAAAAcAAJ&hl=&source=gbs_api
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