"Encyklopedia PWN, www.encyklopedia.pwn.pl Poland in the Second World War / J. Garliński. – Honk Kong, 1985. – p. 138Historical Dictionary of Poland, 966-1945 / J.J. Lerski. - Westport, 1996. - p. 461" . "Polish communists were transferred from USSR to Poland to connect polish communistics parties. The Polska Partia Robotnicza was subordinated to soviet communist party and controlled by the Narodnyj Komissariat Wnutriennich Dieł (People's Commissariat for Internal Affairs). The leaders were: W. Gomulka, B. Bierut. It headed Gwardia Ludowa (Polish People’s Army), Armia Ludowa (People’s Army). When Red Army came to Poland, PPR let Sovietization of the country through terror. It merged with the Polska Partia Socjalistyczna (Polish Socialist Party) into Polska Zjednoczona Partia Robotnicza (Polish United Workers' Party)."@eng . "Polska Partia Robotnicza"@eng . .