Keywords: Mezzosoprano clef with note.svg Author real name Artur Jan Fijałkowski pl wiki WarX commons WarX mail mailto wiki warx gmail com jabber WarX jabber org irc irc //chat freenode net/wikipedia-pl klucz mezzosporanowy z ćwierćnutą c<sup>1</sup> mezzosoprano clef with c<sup>1</sup> quarter-note WarX C clef |