Columbia subject headings:
Hucbald, of Saint Amand, -930.
Music theory--History--500-1400.
Musica enchiriadis.
Harvard subject headings:
Hucbald, of Saint Amand, -930.
Music theory--History--500-1400.
Musica enchiriadis.
Princeton subject headings:
Hucbald, of Saint Amand, -930.
Music theory--History--500-1400.
Musica enchiriadis.