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http://utopia.knoware.nl/users/eprebel/Calendar/Perpetual/

These are the public entries for this link:

• Perpetual Calendar
  The Julian Calendar (for years between A.D. 1 and A.D. 1582), and the Gregorian Calendar (for years between A.D. 1582 and A.D. 2400).
  By Winterthur_Lib in Electronic Reference with calendar reference
• Perpetual Calendar
  By gwooding in Reference with calendar perpetual reference

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