- SZAKTÁRS
- Akadémiai Digitális Archívum
- Szabó Ágnes: Legal and underground labour movement in Hungary, 1919-1945 - Studia historica Academiae Scientiarum Hungaricae 168. (Budapest, 1980)
Szabó Ágnes: Legal and underground labour movement in Hungary, 1919-1945 - Studia historica Academiae Scientiarum Hungaricae 168. (Budapest, 1980)
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