Konrad Prószyński
... that Polish writer and educator Konrad Prószyński, author of internationally recognized primers, had to struggle with the censorship in the Russian Empire?
... that Polish writer and educator <b id="mwDOg"><a href="./Konrad_Prószyński" id="mwDOk" rel="mw:WikiLink" title="Konrad Prószyński">Konrad Prószyński</a></b>, author of internationally recognized <a href="./Primer_(textbook)" id="mwDOo" rel="mw:WikiLink" title="Primer (textbook)">primers</a>, had to struggle with the censorship in the <a href="./Russian_Empire" id="mwDOs" rel="mw:WikiLink" title="Russian Empire">Russian Empire</a>?