Opera MUSIC 427 Genres & Styles 359 Operas 224 Opéras 146 Criticism and interpretation 125 Printed Music 121 Librettos 102 Opéra 70 Instruction & Study 68 Voice 68 Lyrics 66 Vocal 66 Opera & Classical Scores 53 History 46 Oper 45 Music 39 Analysis, appreciation 32 Analyse et appréciation 29 Musique 29 History and criticism 27 Histoire 23 Production and direction 23 BIOGRAPHY & AUTOBIOGRAPHY 22 Composers & Musicians 22 Romantic music (c 1830 to c 1900) 20 Composers 19 General 19 Production et mise en scène 19 Social aspects 17