$a The JDC Archives, 24.03.2013 $u http://archives.jdc.org/exhibits/in-memoriam/israel-friedlaender.html
670
$a LCA online.
670
$a Kp. History of the Jews in Russia and Poland, from the earliest times until the present day. Vol. 1, From the beginning until the death of Alexander I / by S. M. Dubnow. - Philadelphia, cop. 1916. $b Tł. z jęz. ros.