Nikolay Diletsky
... that the dates of birth and death of the Ukrainian music theorist and composer Nikolay Diletsky remain unknown?
... that the dates of birth and death of the <a href="./Music_of_Ukraine" id="mwAUs" rel="mw:WikiLink" title="Music of Ukraine">Ukrainian</a> <a href="./Music_theory" id="mwAUw" rel="mw:WikiLink" title="Music theory">music theorist</a> and <a href="./Composer" id="mwAU0" rel="mw:WikiLink" title="Composer">composer</a> <b id="mwAU4"><a href="./Nikolay_Diletsky" id="mwAU8" rel="mw:WikiLink" title="Nikolay Diletsky">Nikolay Diletsky</a></b> remain unknown?