Szabó Ágnes: Legal and underground labour movement in Hungary, 1919-1945 - Studia historica Academiae Scientiarum Hungaricae 168. (Budapest, 1980)
STUDIAJ"JlSTORICA Academiae Scientiarum Hungaricae Á. SZABÓ AND I. PINTÉR LEGAL AND UNDERGROUND LABOUR MOVEMENT IN HUNGARY 1919-1945