Columbia subject headings:
Guillaume, de Machaut, approximately 1300-1377. Motets.
Ivrea codex.
Motets--500-1400.
Motets--France--500-1400.
Vitry, Philippe de, 1291-1361. Motets.
Harvard subject headings:
Guillaume, de Machaut, approximately 1300-1377. Motets.
Ivrea codex
Motets--France--500-1400--History and criticism.
Motets--France--500-1400.
Vitry, Philippe de, 1291-1361. Motets.
Princeton subject headings:
Guillaume, de Machaut, approximately 1300-1377. Motets.
Ivrea codex.
Motets--500-1400.
Motets--History and criticism--France--500-1400.
Vitry, Philippe de, 1291-1361. Motets.