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  1. 21
    Subjects ...Astronomy Periodicals....
    Serial
  2. 22
    Subjects ...Astronomy Periodicals....
    Journal
  3. 23
    Published 1955
    Subjects ...Astronomy Periodicals....
    Journal
  4. 24
    Published 1833
    Subjects
    Serial
  5. 25
    Published 1989
    Subjects ...Astronomy Periodicals....
    Journal
  6. 26
    Published 1970
    Subjects ...Astronomy Periodicals....
    Journal
  7. 27
    Subjects
    Journal
  8. 28
    Published 1969
    Subjects ...Astronomy Periodicals....
    Journal
  9. 29
    Published 1984
    Subjects ...Astronomy Periodicals....
    Journal
  10. 30
    Subjects ...Astronomy History Periodicals....
    Journal
  11. 31
    Subjects ...Astronomy Observations Periodicals....
    Journal
  12. 32
    Published 1963
    Subjects ...Astronomy Observations Periodicals....
    Serial
  13. 33
    Published 1946
    Subjects ...Astronomy Observations Periodicals....
    Serial
  14. 34
    Subjects ...Astronomy Observations Periodicals....
    Journal
  15. 35
    Published 1961
    Subjects ...Astronomy Observations Periodicals....
    Journal
  16. 36
    Published 1959
    Subjects ...Astronomy Observations Periodicals....
    Serial
  17. 37
    Published 1979
    Subjects ...Astronomy, Prehistoric Periodicals....
    Journal
  18. 38
    Published 1829
    Subjects ...Astronomy Observations Periodicals....
    Serial
  19. 39
    Subjects ...Astronomy Observations Periodicals....
    Journal
  20. 40
    Published 1998
    Subjects ...Astronomy History Periodicals....
    Journal