Columbia subject headings:
Ap Huw manuscript.
Harp music--History and criticism.
Harp music.
Music--Wales--History and criticism.
Music--Wales.
Harvard subject headings:
Ap Huw manuscript
Celtic harp music--Wales--500-1400--History and criticism.
Celtic harp music--Wales--500-1400.
Harp music
Harp music--History and criticism.
Manuscripts, Medieval--Wales.
Music--Wales
Music--Wales--History and criticism.
Princeton subject headings:
Ap Huw manuscript.
Harp music--History and criticism.
Harp music.
Music--Wales--History and criticism.
Music--Wales.