MIA: Encyclopedia of Marxism: Glossary of Organisations
Abbreviation for the Russian Social Democratic Labour Party. After the split of the party in 1903, the name was still used at times by both groups, and this is noted with a (B) or (M) following the abbreviation, denoting the Bolshevik and Menshevik parties respectively – eg. R.S.D.L.P. (B).
Abbreviation for the Russian Soviet Federated Soviet Republic