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FIRST PERIOD 450 -1066
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SECOND PERIOD 1066 - 1500
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THIRD PERIOD 1500 - 1660
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FOURTH PERIOD 1653 1660
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FIFTH PERIOD 1660-1700
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SIXTH PERIOD 1700 . 1798
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SEVENTH PERIOD 1798 - 1837
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EIGHTH PERIOD1837 - 1901
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NINTH PERIOD 1901 - 1940
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ELEVENTH PERIOD 1945 TO PRESENT
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TENTH PERIOD 1940 - 2000
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FIRST PART REFERENCES
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SECOND PART REFERENCES