| 21. | At the end of this column are some suggestions for useful reference books.
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| 22. | Reference books show that the fish symbol first appeared in the second century.
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| 23. | Now both the reference books are property of Government of India.
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| 24. | Often, the reference books and the jurors do not agree with one another.
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| 25. | Modern reference books also contain entries dealing with the superhuman world.
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| 26. | The 1, 059-page reference book is available at many public libraries.
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| 27. | Another reference book, Sikhs in Europe mentioned regarding Sikhs in Norway.
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| 28. | He was meticulous; he cited 32 reference books in his notes.
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| 29. | His publications are also used as reference books in many organisations.
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| 30. | It moreover won several awards as " best reference book ".
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