Page history
October 9, 2025
July 13, 2016
January 11, 2011
May 13, 2009
March 25, 2009
refine
-211
move to footnote since it is not related to OPC
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+material -cat; give ref
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refine wording
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+
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March 24, 2009
newer stats
+20
no edit summary
m+17
newer stats
+15
→References: add external links
+60
→Further reading
m+1
no edit summary
m+61
add details and bibliog
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improvements
-2
fixes
+14
-s +points
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+strict
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fixes
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add material
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fixes
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fixes
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fixes
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-during +of
-4