- International Chemistry Olympiad Information Center - http://www.icho.sk/
- History, regulations, reports, minutes, and an index of IChO home pages.
- IChO Mailing List - http://groups.yahoo.com/group/icho/
- Only available to former IChO participants. Includes archives.
- The International Chemistry Olympiad '95 - http://www.hut.fi/~aniskane/icho-pages.html
- Personal page of Antti Niskanen's from Finland. Includes a list of participants contact information and personal pages.
- 35th International Chemistry Olympiad (Greece, 2003) - http://www.35icho.uoa.gr/
- Athens, 5-14 July 2003. Final results, history, program, syllabus, preparatory problems, and participating countries.
- International Chemistry Olympiad (IChO) - http://olympiads.win.tue.nl/icho/
- Unofficial site with rules and regulations, sample questions, directory of links to official international and national chemistry olimpiad sites.
- 37th International Chemistry Olympiad (Taiwan, 2005) - http://icho.chem.ntnu.edu.tw/
- Taipei, July 16-35. Program, news, participating countries, results, and regional information.
- International Chemistry Olympiad - Wikipedia - http://en.wikipedia.org/wiki/international_chemistry_olympiad
- Article about the structure, rules, and history of the IChO.
- 38th International Chemistry Olympiad (South Korea, 2006) - http://icho2006.kcsnet.or.kr/main/i_main/?language=en
- Gyeongsan, July 8-11. Program, sponsors, geography, and press kit.
- Friends of the Chemistry Olympiad - http://www.fcho.de/
- Founded in Germany in 1992, aims to increase contact among former participants at the International Chemistry Olympiads.
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