"Founded in 1892" . "Poles, Jews, and the Politics of Nationality / J.D. Zimmerman. - Wisconsin, 2004. - p. 4"@en . "The Polska Partia Socjalistyczna was established in 1892 by descendants of the Polish nobility and Polonized Jews from Warsaw. PPS combined the ideology of socialism with the Polish insurrectionary tradition."@en . . . "Polska Partia Socjalistyczna"@en . .