USA Combined Events: Decathlon and Heptathlon - http://www.usatf.org/heptathlon/ Resources gathered by the USA Track and Field Association regarding these two sports, including links, events and results, and competitors.
DECA - the Decathlon Association - http://www.decathlonusa.org Resources, results, records, event information, history, links and news in the world of Olympic, college and high school decathlon.
Decathlon 2000 - http://www.decathlon2000.ee/eng/index.php News, statistics and information about the decathlon, including biographies of famous decathletes.
Double Multievents - http://www.icosathlon.net/ Double decathlon, double weight pentathlon and other extreme track and field multi-events.
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