Keywords: Alto 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 altowy z ćwierćnutą c<sup>1</sup> alto clef with c<sup>1</sup> quarter-note WarX C clef |