Columbia subject headings:
Jacques, de Liège, approximately 1260-approximately 1330. Speculum musicae. Liber 6.
Music theory--History--500-1400.
Musical intervals and scales.
Harvard subject headings:
Jacques, de Liège, approximately 1260-approximately 1330. Speculum musicae.
Jacques, de Liège, approximately 1260-approximately 1330. Speculum musicae. Liber 6.
Music theory--History--500-1400.
Musical intervals and scales--History.
Musical intervals and scales.
Princeton subject headings:
Jacques, de Liège, approximately 1260-approximately 1330. Speculum musicae.
Music--Germany--History and criticism.