Wikipedia, viewed Apr. 24, 2006 (Socialist International (SI); international organization; has it roots in the Second International, formed in 1889; split by WWI it was reformed in 1923 as the Labour and Socialist International and reconstituted in its present form after WWII)
Socialist International, viewed 24 Apr. 2006 (conference list does not include any before 1951; web site lists members and activities, etc.) http://www.socialistinternational.org/main.html