Mass, Op. 130
... that, although Joseph Jongen conducted the first performance of Mass, Op. 130 at Liège Cathedral in 1946, it was not published until 1990?
... that, although <a href="./Joseph_Jongen" id="mwBdg" rel="mw:WikiLink" title="Joseph Jongen">Joseph Jongen</a> conducted the first performance of <b id="mwBdk"><a class="mw-redirect" href="./Mass,_Op._130" id="mwBdo" rel="mw:WikiLink" title="Mass, Op. 130">Mass, Op. 130</a></b> at <a href="./Liège_Cathedral" id="mwBds" rel="mw:WikiLink" title="Liège Cathedral">Liège Cathedral</a> in 1946, it was not published until 1990?