"USDP" . . . . . . . . . . . . . . . . . . . "1905" . . . "social democrats" . . . . "Ukrainian Menshevik" . "1950" . . . "USDLP" . "socialist" . . . . "socialist revolutionary attitude" . . . "Ukrainian Social-Democratic Labor Party" . . . "Ukrainian Social Democratic Labour Party" . . "Social Democratic" . . "Labour Congress of Ukraine" . "Social-Democratic Party" . "Ukrainian Social Democratic Labour Party" . . . . . . . . . . "USDRP" . "Esdek" . . . . "SDPists" . "Red" . . "1950-03-26" .