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  1. 1
    Astronomical phenomena for the year ... /
    Published 1950
    Government Document Serial
  2. 2
    Almanac for computers.
    Published 1980
    Government Document Serial
  3. 3
    Key dates.
    Government Document Serial
  4. 4
    Publications of the United States Naval Observatory.
    Published 1900
    Government Document Microform Serial
  5. 5
    Annals of the Astrophysical Observatory of the Smithsonian Institution.
    Published 1900
    Government Document Serial
  6. 6
    Report on active and planned spacecraft and experiments.
    Get full text
    Government Document Serial
  7. 7
    USSR and Eastern Europe scientific abstracts.
    Get full text
    Government Document Serial
  8. 8
    Astronomical phenomena for the year ... /
    Published 1950
    Volumes 2015-
    Government Document Serial
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