A. Laska. POLISH SOCIALIST PARTY - FORMER REVOLUTIONARY FACTION VIS-A-VIS THE EVOLUTION REFORM POLITICAL CAMP DURING THE PERIOD 1928-1935. 6th SWS International Scientific Conference on Arts and Humanities ISCAH 2019, 2019, pp. 29-36. https://doi.org/10.5593/SWS.ISCAH.2019.1/S08.005