References

Encyclopedias

http://www.britannica.com online encyclopedia
http://www.factmonster.com
http://www.pantheon.org (Encyclopedia mythica)
http://www.bartleby.com (Online Columbia encyclopedia)
http://www.encyclopedia.com
http://thecanadianencyclopedia.com/index.cfm?TCE_Version=A (Canadian encyclopedia)
http://www.infoplease.com

Dictionaries

http://www.yourdictionary.com
http://dictionary.cambridge.org
http://www.dictionary.com

Calendars

http://www.almanac.com
http://www.mrdowling.com/601-years.html
http://www.dailyglobe.com/day2day.html (World dates archive)

Biographies

http://www.s9.com/biography
http://www.nobel.se all noble winners in all fields
http://www.nobelprize.org/
http://www.who2.com