Music History and criticism 2,168 Manuscripts 947 Facsimiles 819 Social aspects 424 Philosophy and aesthetics 382 History 359 more ... Scores 346 African Americans 247 Folk music 242 Popular music 209 Bibliography 162 Psychological aspects 162 Composers 144 Criticism and interpretation 142 Instruction and study 139 Musicians 122 Performance 108 Acoustics and physics 96 Periodicals 95 Jews 88 Music theory 88 Political aspects 82 Social life and customs 81 Musical instruments 77 Jazz 67 Religious aspects 67 Indians of North America 63 Musicology 61 Operas 61 less ...