The Central Committee compositions elected by the 1st, 2nd and 3rd congresses of the Russian Social Democratic Labour Party (RSDLP) were in session 1898–1903, 1903–1905 and 1905–1906 respectively.
1st Central Committee (1898–1903)
References
Central Committee compositions elected by the 1st–3rd congresses of the Russian Social Democratic Labour Party Wikipedia(Text) CC BY-SA