skos:altLabel | - Poland
- Regional Presidium of the Social Democracy of the Kingdom of Poland and Lithuania
- Polish Social Democrat
- SDKPiL
- SDKPiL Party
- Social Democracy of Poland and Lithuania
- Social Democracy of the Kingdom of Poland
- Social Democratic Party of Poland
- The Social Democracy of the Kingdom of Poland
- Union of Workers
- Regional Social Democracy of the Kingdom of Poland and Lithuania
- Social Democrats of the Kingdom of Poland and Lithuania
- Main Presidium of the Social Democracy of the Kingdom of Poland and Lithuania
- Social Democratic Party of the Kingdom of Poland and Lithuania
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