Nordahl Rolfsen'
... that Nordahl Rolfsen's readers for elementary school, Læsebog for folkeskolen (published 1892–1895), became the most widely used schoolbook in Norway?
... that <b id="mwFtg"><a href="./Nordahl_Rolfsen" id="mwFtk" rel="mw:WikiLink" title="Nordahl Rolfsen">Nordahl Rolfsen</a>'</b>s <a href="./Basal_reader" id="mwFto" rel="mw:WikiLink" title="Basal reader">readers</a> for <a class="mw-redirect" href="./Elementary_school" id="mwFts" rel="mw:WikiLink" title="Elementary school">elementary school</a>, <i id="mwFtw">Læsebog for folkeskolen</i> (published 1892–1895), became the most widely used schoolbook in Norway?