Harkness rating system

http://dbpedia.org/resource/Harkness_rating_system

rdf:langString Harkness rating system
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<http://dbpedia.org/resource/Chess_rating_system>
<http://dbpedia.org/resource/Chess_rating_system>
<http://en.wikipedia.org/wiki/Harkness_rating_system?oldid=366057552&ns=0>
<http://en.wikipedia.org/wiki/Harkness_rating_system>

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