en.wikipedia.org/wiki/Help:Authority_control

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Page Duplicate Content Search title or URL  
  URL Title Match Words ▾ Match Percentage
wiki/Wikipedia:About_the_sandbox Wikipedia:About the sandbox - Wikipedia 276 8%
wiki/JSTOR JSTOR - Wikipedia 228 6%
wiki/List_of_decades,_centuries,_and_... List of decades, centuries, and ... 227 6%
wiki/Wikipedia:Good_articles Wikipedia:Good articles - Wikipedia 219 6%