Sources

Every source backing a fact on Educational Testing Service's own page, deduplicated — the same source backing several facts appears once.

• http://chi1995.acm.org/ — http://chi1995.acm.org/
• https://chi1996.acm.org/ — https://chi1996.acm.org/
• https://github.com/sven-mayer/chi-statistics — https://github.com/sven-mayer/chi-statistics
• https://github.com/sven-mayer/chi-statistics — https://github.com/sven-mayer/chi-statistics