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  1. 1
    published 1912
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    Electronic Journal
  2. 2
    published 2008
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  3. 3
    by Herschel, William
    published 1850
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    E-Book
  4. 4
    by Lohrmann, Wilhelm Gotthelf
    published 1824
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  5. 5
    by Brandes, Heinrich Wilhelm
    published 1830
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  6. 6
    Full Text
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  7. 7
    published 1883
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  8. 8
    by Euclides
    published 1533
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  9. 9
  10. 10
  11. 11
    by Accum, Friedrich
    published 2010
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  12. 12
    by Accum, Friedrich
    published 1819
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  13. 13
  14. 14
  15. 15
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