"13/11/1888\n\n26/04/1961" . . . . . . . "Schwartzbart Ignacy" . . . . . . . . "The YIVO encyclopedia of Jews in Eastern Europe / ed. G. D. Hundert. - Yale Univ., 2008. - v. 2, p. 1680"@en . "Polish Zionist Leader. Key figure in the transmission of news about the Holocaust to the West."@en . . . . . . . . . . . .